MASTERKEY-265: Pembrolizumab With Talimogene Laherparepvec or Placebo in Unresected Melanoma

Sponsor
Amgen (Industry)
Overall Status
Terminated
CT.gov ID
NCT02263508
Collaborator
Merck Sharp & Dohme LLC (Industry)
713
161
3
75.1
4.4
0.1

Study Details

Study Description

Brief Summary

The primary objectives of the Phase 1b part of the study are to evaluate the safety, as assessed by incidence of dose limiting toxicity (DLT), of talimogene laherparepvec in combination with pembrolizumab in adults with previously untreated, unresectable, stage IIIB to IVM1c melanoma.

The primary objective of Phase 3 are to evaluate the efficacy of talimogene laherparepvec with pembrolizumab versus placebo with pembrolizumab, as assessed by progression-free survival (PFS) (response evaluation by blinded independent central review using modified Response Evaluation Criteria in Solid Tumors [RECIST] 1.1) and overall survival (OS).

Condition or Disease Intervention/Treatment Phase
Phase 3

Study Design

Study Type:
Interventional
Actual Enrollment :
713 participants
Allocation:
Randomized
Intervention Model:
Parallel Assignment
Intervention Model Description:
Phase 1b was an open-label, single-arm study. Phase 3 was a randomized, double-blind, placebo-controlled study design.Phase 1b was an open-label, single-arm study. Phase 3 was a randomized, double-blind, placebo-controlled study design.
Masking:
Double (Participant, Investigator)
Primary Purpose:
Treatment
Official Title:
A Phase 1b/3, Multicenter, Trial of Talimogene Laherparepvec in Combination With Pembrolizumab (MK-3475) for Treatment of Unresectable Stage IIIB to IVM1c Melanoma (MASTERKEY-265)
Actual Study Start Date :
Dec 8, 2014
Actual Primary Completion Date :
Mar 11, 2021
Actual Study Completion Date :
Mar 11, 2021

Arms and Interventions

Arm Intervention/Treatment
Experimental: Phase 1b: Talimogene Laherparepvec + Pembrolizumab

Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ plaque-forming units (PFU)/mL by intralesional injection. Subsequent doses of talimogene laherparepvec at up to 4 mL of 10⁸ PFU/mL began 3 weeks after the first dose and were administered every 2 weeks until disappearance of injectable lesions, complete response (CR), confirmed disease progression (PD) per modified Immune-related Response Criteria (irRC), intolerance of study treatment, 24 months from the date of the first dose of pembrolizumab, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 2 weeks starting at the time of the third dose of talimogene laherparepvec (week 6) until confirmed PD per modified irRC, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.

Drug: Talimogene Laherparepvec
Talimogene laherparepvec administered by intratumoral injection
Other Names:
  • IMLYGIC®
  • OncoVEX^GM-CSF
  • T-VEC
  • Drug: Pembrolizumab
    Administered at a dose of 200 mg as an intravenous infusion over approximately 30 minutes.
    Other Names:
  • MK-3475
  • Keytruda®
  • Placebo Comparator: Phase 3 : Placebo + Pembrolizumab

    Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.

    Drug: Pembrolizumab
    Administered at a dose of 200 mg as an intravenous infusion over approximately 30 minutes.
    Other Names:
  • MK-3475
  • Keytruda®
  • Drug: Placebo
    Administered by intratumoral injection

    Experimental: Phase 3: Talimogene Laherparepvec + Pembrolizumab

    Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.

    Drug: Talimogene Laherparepvec
    Talimogene laherparepvec administered by intratumoral injection
    Other Names:
  • IMLYGIC®
  • OncoVEX^GM-CSF
  • T-VEC
  • Drug: Pembrolizumab
    Administered at a dose of 200 mg as an intravenous infusion over approximately 30 minutes.
    Other Names:
  • MK-3475
  • Keytruda®
  • Outcome Measures

    Primary Outcome Measures

    1. Phase 1b: Number of Participants With Dose-limiting Toxicities (DLTs) [The DLT evaluation period was 6 weeks from the initial administration of pembrolizumab (week 6 to 12).]

      A DLT was defined as any toxicity related to study drug which met any of the following criteria based on Common Terminology Criteria for Adverse Events (CTCAE) version 4.0: Grade 4 non-hematologic toxicity. Grade 3 or higher pneumonitis. Grade 3 non-hematologic toxicity lasting > 3 days despite optimal supportive care, excluding grade 3 fatigue. Any grade 3 or higher non-hematologic laboratory value if medical intervention was required, or the abnormality lead to hospitalization, or the abnormality persisted for > 1 week. Febrile neutropenia grade 3 or grade 4. Thrombocytopenia < 25 x 10^9/L if associated with a bleeding event which does not result in hemodynamic instability but required an elective platelet infusion, or a life-threatening bleeding event which resulted in urgent intervention and admission to intensive care unit. Grade 5 toxicity (ie, death). Any other intolerable toxicity leading to permanent discontinuation of talimogene laherparepvec or pembrolizumab.

    2. Phase 3: Progression Free Survival (PFS) by Blinded Independent Central Review (BICR) Assessed Using Modified RECIST 1.1 [From randomization until the data-cut-off date of 02 March 2020; median (range) time on follow-up was 25.5 (0.6, 44.7) months in the Placebo + Pembrolizumab arm and 25.6 (0.3, 45.8) months in the Talimogene Laherparepvec + Pembrolizumab arm.]

      PFS per modified Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 is defined as the interval from randomization to the earlier event of progressive disease (PD) per modified RECIST 1.1 or death from any cause. PD: Increase in size of target lesions from nadir by ≥ 20% and ≥ 5 mm absolute increase above nadir, or the appearance of a new lesion. Median PFS was calculated using the Kaplan-Meier method. Participants without an event were censored at their last evaluable tumor assessment if available; otherwise on their randomization date. The primary analysis of PFS was specified to be conducted when 407 PFS events had occurred (data cut-off date 02 March 2020).

    3. Phase 3: Overall Survival [From randomization until the end of study; median (range) time on follow-up was 34.8 (0.6, 58.3) months in the Placebo + Pembrolizumab arm and 36.8 (0.3, 58.4) months in the Talimogene Laherparepvec + Pembrolizumab arm.]

      Overall survival (OS) is defined as the interval from randomization to death from any cause. Median overall survival was calculated using the Kaplan-Meier method. Participants without an event were censored at their last known alive date.

    Secondary Outcome Measures

    1. Phase 1b: Objective Response Rate (ORR) [Tumor assessments were performed at week 6 (prior to initiation of pembrolizumab), week 18, and every 12 weeks thereafter until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 58.6 (1.4, 61.6) months.]

      ORR is defined as the percentage of participants with a best overall response of complete response (CR) or partial response (PR) using the modified Immune-related Response Criteria (irRC), by Investigator assessment. CR was defined as the disappearance of all lesions; PR was defined as a decrease in tumor area ≥ 50% relative to baseline, response must have been confirmed by a second, consecutive assessment at least 4 weeks apart. Radiographic imaging for assessment of lesions was performed using computed tomography (CT), positron emission tomography (PET), magnetic resonance imaging (MRI), or ultrasound. Clinical measurement of cutaneous, subcutaneous, and palpable nodal tumor lesions was conducted with calipers.

    2. Phase 1b: Best Overall Response (BOR) [Tumor assessments were performed at week 6 (prior to initiation of pembrolizumab), week 18, and every 12 weeks thereafter until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 58.6 (1.4, 61.6) months.]

      Best overall response is defined as the best overall visit response in the following order: CR, PR, stable disease (SD), progressive disease (PD), or unevaluable (UE), based on investigator assessment using the modified irRC up to the start of any subsequent anti-cancer therapy. CR was defined as the disappearance of all lesions; PR was defined as a decrease in tumor area ≥ 50% relative to baseline; PD was defined as an increase in tumor area ≥ 25% relative to nadir; and SD was defined as any outcome not meeting the criteria for response or PD with ≥ 77 days elapsed after enrollment. Responses and PD must have been confirmed by a second, consecutive assessment at least 4 weeks apart.

    3. Phase 1b: Durable Response Rate (DRR) [Tumor assessments were performed at week 6 (prior to initiation of pembrolizumab), week 18, and every 12 weeks thereafter until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 58.6 (1.4, 61.6) months.]

      DRR is defined as the percentage of participants with a best overall response of CR or PR using the modified irRC per Investigator assessment with a duration of response of at least 6 months. CR was defined as the disappearance of all lesions; PR was defined as a decrease in tumor area ≥ 50% relative to baseline, response must have been confirmed by a second, consecutive assessment at least 4 weeks apart.

    4. Phase 1b: Duration of Response (DOR) [Tumor assessments were performed at week 6 (prior to initiation of pembrolizumab), week 18, and every 12 weeks thereafter until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 58.6 (1.4, 61.6) months.]

      Duration of response (DOR) is defined as the time from the date of an initial response (CR or PR) that is subsequently confirmed to the earlier of confirmed PD or death. Participants who had not ended their response at the time of analysis were censored at their last evaluable tumor assessment before start of the first subsequent anticancer therapy. CR was defined as the disappearance of all lesions; PR was defined as a decrease in tumor area ≥ 50% relative to baseline; PD was defined as an increase in tumor area ≥ 25% relative to nadir. Response and PD must have been confirmed by a second, consecutive assessment at least 4 weeks apart.

    5. Phase 1b: Disease Control Rate (DCR) [Tumor assessments were performed at week 6 (prior to initiation of pembrolizumab), week 18, and every 12 weeks thereafter until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 58.6 (1.4, 61.6) months.]

      DCR is defined as the percentage of participants with a best overall response of CR, PR, or SD using the modified irRC per Investigator assessment. CR was defined as the disappearance of all lesions; PR was defined as a decrease in tumor area ≥ 50% relative to baseline, response must have been confirmed by a second, consecutive assessment at least 4 weeks apart; and SD was defined as any outcome not meeting the criteria for response or PD with ≥ 84 days elapsed after enrollment.

    6. Phase 1b: Progression-free Survival (PFS) [From first dose until the end of study; median (range) time on follow-up was 70.6 (1.4, 74.5) months.]

      Progression-free survival is defined as the time from first dose to the earlier event of confirmed PD per modified irRC or death from any cause. PFS was estimated using the Kaplan-Meier method. Participants without an event were censored at their last evaluable tumor assessment.

    7. Phase 1b: Overall Survival (OS) [From first dose until the end of study; median (range) time on follow-up was 70.6 (1.4, 74.5) months.]

      Overall survival is defined as the interval from first dose to death from any cause. OS was estimated using the Kaplan-Meier method. Participants without an event were censored at their last known alive date.

    8. Phase 3: Complete Response Rate Assessed Using Modified irRC-RECIST (iCRR) [Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.]

      Complete response rate per modified Immune-related Response Criteria (irRC) simulating RECIST 1.1 (irRC-RECIST) is defined as the percentage of participants with a best overall response of complete response assessed using the modified irRC-RECIST (iCR) evaluated by blinded independent central review. iCR: Disappearance of all lesions (whether measurable or not and whether baseline or new) and confirmation by a repeat, consecutive assessment at least 4 weeks after the criteria were first met. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. Modifications to the irRC-RECIST 1.1 included an increase in the total number of target lesions and new measurable lesions to 10 with a maximum of 5 target lesions per organ, and target lesions must have been measurable by CT or MRI only.

    9. Phase 3: Progression Free Survival Assessed Using Modified irRC-RECIST (iPFS) [From randomization until the data cut-off date of 29 September 2020; median time on follow-up was 30.6 (0.6, 53.0) months in the Placebo + Pembrolizumab arm and 31.4 (0.3, 52.5) months in the Talimogene Laherparepvec + Pembrolizumab arm.]

      PFS per modified irRC-RECIST is defined as the interval from randomization to the earlier event of progressive disease assessed by modified irRC-RECIST (iPD) evaluated by blinded independent central review, or death from any cause. iPD: Increase in tumor burden ≥ 20% and at least 5 mm absolute increase relative to nadir (minimum recorded tumor burden) confirmed by a repeat, consecutive assessment at least 4 weeks after the initial detection. Median iPFS was calculated using the Kaplan-Meier method. Participants without an event were censored at their last evaluable tumor assessment if available; otherwise on their randomization date. The primary analysis of iPFS was specified to be conducted when 256 iPFS events had occurred (data cut-off date 29 September 2020).

    10. Phase 3: Overall Survival Excluding Stage IVM1c Participants [From randomization until the end of study; median (range) time on follow-up was 34.8 (0.6, 58.3) months in the Placebo + Pembrolizumab arm and 36.8 (0.3, 58.4) months in the Talimogene Laherparepvec + Pembrolizumab arm.]

      Overall survival is defined as the interval from randomization to death from any cause. Median OS was calculated using the Kaplan-Meier method. Participants without an event were censored at the last known alive date.

    11. Phase 3: Objective Response Rate Assessed Using Modified RECIST 1.1 [Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.]

      ORR is defined as the percentage of participants with a best overall response of complete response (CR) or partial response (PR) assessed using modified RECIST version 1.1, evaluated by blinded independent central review. CR was defined as the disappearance of all lesions except lymph node short axis < 10 mm; PR was defined as a ≥ 30% reduction in sum of diameters in target lesions. Confirmation of CR or PR was not required. Modifications to conventional RECIST 1.1 included the following: target lesions were measurable on CT or MRI; otherwise, they were considered as nontarget lesions. A maximum of 10 target lesions was allowed with up to 5 per organ.

    12. Phase 3: Best Overall Response Assessed Using Modified RECIST 1.1 [Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.]

      BOR is defined as the best overall visit response up to and including the first overall visit response of PD in the following order: CR, PR, SD, non-CR/Non-PD (NN), PD or UE per modified RECIST 1.1, evaluated by BICR. CR: Disappearance of all lesions except lymph node short axis < 10 mm; PR: ≥ 30% reduction in sum of diameters in target lesions. Confirmation of CR or PR was not required; NN: Persistence of ≥ 1 non-target lesions and/or maintenance of tumor marker level above normal limits; SD: Neither sufficient shrinkage of target lesions to qualify for CR or PR nor sufficient increase to qualify for PD and ≥ 84 days from randomization; PD: Increase from nadir by ≥ 20% or ≥ 5 mm of target lesions or any new lesion; Missing: No postbaseline assessment, or assessments on or after the start of first subsequent anticancer therapy, including complete or partial removal/reduction of any target lesion which contained melanoma on pathology evaluation or pathology results were unknown.

    13. Phase 3: Durable Response Rate (DRR) Assessed Using Modified RECIST 1.1 [Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.]

      DRR is defined as the percentage of participants with a CR or PR per modified RECIST 1.1 evaluated by blinded independent central review, with a duration of response of ≥ 6 months. CR was defined as the disappearance of all lesions except lymph node short axis < 10 mm; PR was defined as a ≥ 30% reduction in sum of diameters in target lesions. Confirmation of CR or PR was not required.

    14. Phase 3: Duration of Response (DOR) Assessed Using Modified RECIST 1.1 [From randomization until the data cut-off date of 29 September 2020; median time on follow-up was 30.6 (0.6, 53.0) months in the Placebo + Pembrolizumab arm and 31.4 (0.3, 52.5) months in the Talimogene Laherparepvec + Pembrolizumab arm.]

      Duration of response (DOR) is defined as the time from the date of an initial response of CR or PR to the earlier of PD per modified RECIST 1.1, or death. Participants who had not ended their response at the time of analysis were censored at their last evaluable tumor assessment date before start of the first subsequent anticancer therapy. CR was defined as the disappearance of all lesions except lymph node short axis < 10 mm; PR was defined as a ≥ 30% reduction in sum of diameters in target lesions. Confirmation of CR or PR was not required. PD was defined as an increase from nadir by ≥ 20% or ≥ 5 mm absolute increase above nadir of target lesions or appearance of any new lesion.

    15. Phase 3: Disease Control Rate (DCR) Assessed Using RECIST 1.1 [Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.]

      Disease control rate (DCR) per modified RECIST 1.1 is defined as the percentage of participants with a best overall response of CR, PR or SD evaluated by blinded independent central review. CR was defined as the disappearance of all lesions except lymph node short axis < 10 mm; PR was defined as a ≥ 30% reduction in sum of diameters in target lesions. Confirmation of CR or PR was not required. SD was defined as neither sufficient shrinkage of target lesions to qualify for CR or PR nor sufficient increase to qualify for PD with ≥ 84 days elapsed after randomization.

    16. Phase 3: Objective Response Rate Assessed Using Modified irRC-RECIST (iORR) [Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.]

      Objective response rate per modified irRC-RECIST is defined as the percentage of participants with a best overall response of iCR or partial response assessed using modified irRC-RECIST (iPR) evaluated by blinded independent central review. iCR: Disappearance of all lesions (whether measurable or not and whether baseline or new) and confirmation by a repeat, consecutive assessment at least 4 weeks from the date first documented. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. iPR: Decrease in tumor burden ≥ 30% relative to baseline confirmed by a consecutive assessment at least 4 weeks after first documentation. Modifications to the irRC-RECIST 1.1 included an increase in the total number of target lesions and new measurable lesions to 10 with a maximum of 5 target lesions per organ, and target lesions must be measurable by CT or MRI only.

    17. Phase 3: Best Overall Response Assessed Using Modified irRC-RECIST [Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.]

      BOR is defined as the best overall visit response in the following order: iCR, iPR, stable disease per modified irRC-RECIST (iSD), iPD, or UE per modified irRC-RECIST (iUE), evaluated by BICR. iCR: Disappearance of all lesions confirmed by consecutive assessment ≥ 4 weeks from the date first documented. Reduction of any pathological lymph node to <10 mm. iPR: Decrease in tumor burden ≥ 30% relative to baseline confirmed ≥ 4 weeks after first documentation. iPD: Increase in tumor burden ≥ 20 % and at least 5 mm absolute increase relative to nadir confirmed ≥ 4 weeks from initial detection. iSD: Neither sufficient shrinkage to qualify for iCR or iPR nor sufficient increase to qualify for iPD and ≥ 84 days from randomization. Missing: No postbaseline assessment, or assessments after start of first subsequent anticancer therapy, including complete or partial removal/reduction of any target lesion which contained melanoma on pathology evaluation or pathology results were unknown.

    18. Phase 3: Durable Response Rate Assessed Using Modified irRC-RECIST (iDRR) [Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.]

      Durable response rate per modified irRC-RECIST is defined as the percentage of participants with a best overall response of iCR or iPR per modified irRC-RECIST evaluated by blinded independent central review with a duration of response ≥ 6 months. iCR: Disappearance of all lesions (whether measurable or not and whether baseline or new) and confirmation by a repeat, consecutive assessment at least 4 weeks from the date first documented. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. iPR: Decrease in tumor burden ≥ 30% relative to baseline confirmed by a consecutive assessment at least 4 weeks after first documentation.

    19. Phase 3: Duration of Response Assessed Using Modified irRC-RECIST (iDOR) [From randomization until the data cut-off date of 29 September 2020; median time on follow-up was 30.6 (0.6, 53.0) months in the Placebo + Pembrolizumab arm and 31.4 (0.3, 52.5) months in the Talimogene Laherparepvec + Pembrolizumab arm.]

      Duration of response per modified irRC-RECIST is defined as the time from the date of an initial response of iCR or iPR that was subsequently confirmed to the earlier of iPD per modified irRC-RECIST evaluated by blinded independent central review, or death. Participants who had not ended their response at the time of analysis were censored at their last evaluable tumor assessment date before the start of the first subsequent anticancer therapy. iCR: Disappearance of all lesions (whether measurable or not and whether baseline or new) and confirmation by a repeat, consecutive assessment at least 4 weeks from the date first documented. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. iPR: Decrease in tumor burden ≥ 30% relative to baseline confirmed by a consecutive assessment at least 4 weeks after first documentation.

    20. Phase 3: Disease Control Rate Assessed Using Modified irRC-RECIST (iDCR) [Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.]

      Disease control rate per modified irRC-RECIST is defined as the percentage of participants with a best overall response of iCR, iCR, or iSD assessed using modified irRC-RECIST evaluated by blinded independent central review. iCR: Disappearance of all lesions (whether measurable or not and whether baseline or new) and confirmation by a repeat, consecutive assessment at least 4 weeks from the date first documented. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. iPR: Decrease in tumor burden ≥ 30% relative to baseline confirmed by a consecutive assessment at least 4 weeks after first documentation. iSD: Neither sufficient shrinkage to qualify for iCR or iPR nor sufficient increase to qualify for iPD with ≥ 84 days elapsed after randomization.

    21. Phase 3: Change From Baseline in European Organisation for Research and Treatment of Cancer Quality of Life Core Module (EORTC QLQ-C30) Global Health Status (GHS)/Quality of Life (QOL) Score [Baseline and day 1 of weeks 3, 6, 9, 12, then every 6 weeks until end of study treatment; median (range) duration of treatment was 39.0 (0.1, 107.3) weeks in Placebo + Pembrolizumab and 54.1 (0.1, 109.6) weeks in Talimogene Laherparepvec + Pembrolizumab.]

      The European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire-C30 (EORTC QLQ-C30) is a 30-question tool used to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status/quality of life scale, 5 functional scales, and 9 symptom scales/items. The global health/QoL scale consists of 2 questions that ask participants to rate their overall health and overall quality of life during the past week on a scale from 1 (very poor) to 7 (excellent). The GHS/QoL subscale score was derived as the mean of each score then transformed to a scale from 0 to 100 where higher scores represent a better health status and a positive change from baseline indicates improvement. The overall change from baseline (calculated from all on-treatment visits) was calculated using a restricted maximum likelihood-based mixed model for repeated measures (MMRM) (see model details in statistical analysis section).

    22. Number of Participants With Treatment-emergent Adverse Events (TEAEs) [From first dose to 30 days after last dose (90 days for SAEs); median (range) duration was 48 (5.1, 110.1) weeks in Phase 1b, 39 (0.1, 107.3) weeks in Placebo + Pembrolizumab and 56 (0.1, 109.6) weeks in Phase 3 Talimogene Laherparepvec + Pembrolizumab.]

      An adverse event (AE) is any untoward medical occurrence in a clinical trial subject, including worsening of a pre-existing medical condition. The event does not necessarily have a causal relationship with study treatment. TEAEs include AEs from the first dose of study drug to 30 days after the last dose. A serious adverse event (SAE) is an AE that met at least 1 of the following criteria: fatal life threatening required in-patient hospitalization or prolongation of existing hospitalization resulted in persistent or significant disability/incapacity congenital anomaly/birth defect other medically important serious event. Treatment-emergent SAEs are any SAE occurring from first dose of study drug through 90 days after the last dose or 30 days after the last dose if new anticancer therapy was started, whichever was earlier. AEs were graded for severity using CTCAE version 4.0, where Grade 1 = Mild; Grade 2 = Moderate; Grade 3 = Severe; Grade 4 = Life-threatening; Grade 5 = Fatal.

    Eligibility Criteria

    Criteria

    Ages Eligible for Study:
    18 Years to 95 Years
    Sexes Eligible for Study:
    All
    Accepts Healthy Volunteers:
    No
    Key Inclusion Criteria:
    • Age ≥ 18 years with histologically confirmed diagnosis of melanoma and stage IIIB to IVM1c for whom surgery is not recommended.

    • Subjects must have measurable disease and be a candidate for intralesional therapy administration into cutaneous, subcutaneous, or nodal lesions.

    • Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1.

    • Adequate hematologic, hepatic, renal, and coagulation function.

    • Subjects with serine/threonine protein kinase B-Raf V600 (BRAFV600) wild-type tumors must not have received any prior systemic anticancer treatment consisting of chemotherapy, immunotherapy, or targeted therapy given in a non-adjuvant setting for unresectable stage IIIB to IVM1c melanoma.

    • Subjects with B-Raf V600 (BRAFV600) mutated tumors who have received prior BRAF inhibitor therapy either alone or in combination with mitogen-activated protein kinase kinase (MEK) inhibitor as their only prior systemic therapy are eligible.

    • Subjects who received prior adjuvant therapy for melanoma will not be excluded (including, but not limited to, interferon, ipilimumab, limb infusion/perfusion, or use of investigational agents in the adjuvant setting) with the exception that prior adjuvant therapy with inhibitors of programmed cell death-1 (PD-1) or programmed cell death ligand 1 (PD-L1) is not allowed. However, if the subject received adjuvant therapy, the subject must have completed therapy at least 28 days prior to enrollment.

    • Subjects must have a tumor sample that is adequate for PD-L1 assessment prior to randomization.

    Key Exclusion Criteria:
    • Subjects must not have clinically active cerebral metastases.

    • Subjects must not have primary uveal or mucosal melanoma, history or evidence of melanoma associated with immunodeficiency states or history of other malignancy within the past 3 years.

    • Subjects may not have been previously treated with talimogene laherparepvec, any other oncolytic virus, pembrolizumab, or any other inhibitor of PD-1, PD-L1, or PD-L2.

    • Subjects must not have history or evidence of symptomatic autoimmune pneumonitis, glomerulonephritis, vasculitis, other symptomatic autoimmune disease, documented history of autoimmune disease or syndrome requiring systemic treatment in the past 2 years (ie, with use of disease modifying agents, steroids or immunosuppressive agents) except vitiligo or resolved childhood asthma/atopy, or evidence of clinically significant immunosuppression.

    • Subjects must not have active herpetic skin lesions or prior complications of herpetic infection and must not require intermittent or chronic treatment with an antiherpetic drug (eg, acyclovir), other than intermittent topical use.

    Contacts and Locations

    Locations

    Site City State Country Postal Code
    1 Research Site Birmingham Alabama United States 35243
    2 Research Site Mobile Alabama United States 36608
    3 Research Site Beverly Hills California United States 90211
    4 Research Site Duarte California United States 91010
    5 Research Site Encinitas California United States 92024
    6 Research Site La Jolla California United States 92037
    7 Research Site Los Angeles California United States 90024
    8 Research Site Los Angeles California United States 90025
    9 Research Site Riverside California United States 92505
    10 Research Site San Francisco California United States 94115
    11 Research Site San Francisco California United States 94117
    12 Research Site Santa Monica California United States 90404
    13 Research Site Miami Beach Florida United States 33140
    14 Research Site Miami Florida United States 33136
    15 Research Site Orlando Florida United States 32806
    16 Research Site Atlanta Georgia United States 30322
    17 Research Site Chicago Illinois United States 60611
    18 Research Site Chicago Illinois United States 60637
    19 Research Site Louisville Kentucky United States 40202
    20 Research Site Baltimore Maryland United States 21237
    21 Research Site Boston Massachusetts United States 02215
    22 Research Site Detroit Michigan United States 48201
    23 Research Site Fridley Minnesota United States 55432
    24 Research Site Saint Louis Missouri United States 63110-1093
    25 Research Site Hackensack New Jersey United States 07601
    26 Research Site Buffalo New York United States 14263
    27 Research Site New York New York United States 10016
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    29 Research Site New York New York United States 10065
    30 Research Site Cincinnati Ohio United States 45209
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    32 Research Site Philadelphia Pennsylvania United States 19107
    33 Research Site Philadelphia Pennsylvania United States 19111
    34 Research Site Pittsburgh Pennsylvania United States 15232
    35 Research Site Germantown Tennessee United States 38138
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    41 Research Site Seattle Washington United States 98109-1023
    42 Research Site North Sydney New South Wales Australia 2060
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    44 Research Site Wollongong New South Wales Australia 2500
    45 Research Site Southport Queensland Australia 4215
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    47 Research Site Woodville South South Australia Australia 5011
    48 Research Site Geelong Victoria Australia 3220
    49 Research Site Heidelberg Victoria Australia 3084
    50 Research Site Melbourne Victoria Australia 3000
    51 Research Site Prahran Victoria Australia 3181
    52 Research Site Murdoch Western Australia Australia 6150
    53 Research Site Graz Austria 8036
    54 Research Site Innsbruck Austria 6020
    55 Research Site Salzburg Austria 5020
    56 Research Site Wien Austria 1090
    57 Research Site Bruxelles Belgium 1200
    58 Research Site Liege Belgium 4000
    59 Research Site Edmonton Alberta Canada T6G 1Z2
    60 Research Site Kingston Ontario Canada K7L 2V7
    61 Research Site London Ontario Canada N6A 4L6
    62 Research Site Ottawa Ontario Canada K1H 8L6
    63 Research Site Toronto Ontario Canada M5G 2M9
    64 Research Site Montreal Quebec Canada H3T 1E2
    65 Research Site Quebec Canada G1R 2J6
    66 Research Site Brno Czechia 656 53
    67 Research Site Olomouc Czechia 775 20
    68 Research Site Ostrava-Poruba Czechia 708 52
    69 Research Site Praha 10 Czechia 100 34
    70 Research Site Praha 2 Czechia 128 08
    71 Research Site Praha 8 Czechia 180 81
    72 Research Site Helsinki Finland 00290
    73 Research Site Bordeaux Cedex France 33075
    74 Research Site Grenoble Cedex 9 France 38043
    75 Research Site Lille France 59037
    76 Research Site Lyon cedex 08 France 69373
    77 Research Site Marseille cedex 05 France 13385
    78 Research Site Nantes Cedex 1 France 44093
    79 Research Site Paris France 75010
    80 Research Site Pierre Benite Cedex France 69495
    81 Research Site Toulouse cedex 9 France 31059
    82 Research Site Vandoeuvre les Nancy France 54511
    83 Research Site Berlin Germany 10117
    84 Research Site Dresden Germany 01307
    85 Research Site Erlangen Germany 91054
    86 Research Site Essen Germany 45147
    87 Research Site Hannover Germany 30625
    88 Research Site Heidelberg Germany 69120
    89 Research Site Kiel Germany 24105
    90 Research Site Leipzig Germany 04103
    91 Research Site Mainz Germany 55131
    92 Research Site Mannheim Germany 68167
    93 Research Site München Germany 80337
    94 Research Site Regensburg Germany 93053
    95 Research Site Tübingen Germany 72076
    96 Research Site Würzburg Germany 97080
    97 Research Site Athens Greece 11527
    98 Research Site Athens Greece 18547
    99 Research Site Heraklion - Crete Greece 71110
    100 Research Site Ioannina Greece 45500
    101 Research Site Thessaloniki Greece 54622
    102 Research Site Budapest Hungary 1122
    103 Research Site Pecs Hungary 7632
    104 Research Site Szeged Hungary 6720
    105 Research Site Bergamo Italy 24127
    106 Research Site Brescia Italy 25123
    107 Research Site Meldola FC Italy 47014
    108 Research Site Milano Italy 20133
    109 Research Site Milano Italy 20141
    110 Research Site Siena Italy 53100
    111 Research Site Seoul Korea, Republic of 03722
    112 Research Site Seoul Korea, Republic of 05505
    113 Research Site Amsterdam Netherlands 1066 CX
    114 Research Site Amsterdam Netherlands 1081 HV
    115 Research Site Groningen Netherlands 9713 GZ
    116 Research Site Nijmegen Netherlands 6525 GA
    117 Research Site Bielsko-Biala Poland 43-300
    118 Research Site Bydgoszcz Poland 85-796
    119 Research Site Gdansk Poland 80-952
    120 Research Site Konin Poland 62-500
    121 Research Site Krakow Poland 31-501
    122 Research Site Poznan Poland 60-848
    123 Research Site Poznan Poland 61-866
    124 Research Site Szczecin Poland 71-730
    125 Research Site Warszawa Poland 02-781
    126 Research Site Wroclaw Poland 50-368
    127 Research Site Almada Portugal 2801-951
    128 Research Site Lisboa Portugal 1099-023
    129 Research Site Lisboa Portugal 1649-035
    130 Research Site Porto Portugal 4200-072
    131 Research Site Moscow Russian Federation 115478
    132 Research Site Saint-Petersburg Russian Federation 197758
    133 Research Site Groenkloof Gauteng South Africa 0181
    134 Research Site Johannesburg Gauteng South Africa 2196
    135 Research Site Parktown Gauteng South Africa 2193
    136 Research Site Kraaifontein South Africa 7570
    137 Research Site Pretoria South Africa 0002
    138 Research Site Pretoria South Africa 0081
    139 Research Site Badalona Cataluña Spain 08916
    140 Research Site Barcelona Cataluña Spain 08036
    141 Research Site Valencia Comunidad Valenciana Spain 46014
    142 Research Site Pamplona Navarra Spain 31008
    143 Research Site San Sebastian País Vasco Spain 20014
    144 Research Site Madrid Spain 28009
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    147 Research Site Bellinzona Switzerland 6500
    148 Research Site Bern Switzerland 3010
    149 Research Site Geneva 14 Switzerland 1211
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    151 Research Site Zürich Switzerland 8091
    152 Research Site Birmingham United Kingdom B15 2TH
    153 Research Site Guildford United Kingdom GU2 7XX
    154 Research Site Leeds United Kingdom LS9 7TF
    155 Research Site Leicester United Kingdom LE1 5WW
    156 Research Site London United Kingdom SE1 9RT
    157 Research Site London United Kingdom SW3 6JJ
    158 Research Site Manchester United Kingdom M20 4BX
    159 Research Site Oxford United Kingdom OX3 7LJ
    160 Research Site Preston United Kingdom PR2 9HT
    161 Research Site Southampton United Kingdom SO16 6YD

    Sponsors and Collaborators

    • Amgen
    • Merck Sharp & Dohme LLC

    Investigators

    • Study Director: MD, Amgen

    Study Documents (Full-Text)

    More Information

    Additional Information:

    Publications

    Responsible Party:
    Amgen
    ClinicalTrials.gov Identifier:
    NCT02263508
    Other Study ID Numbers:
    • 20110265
    • 2014-000185-22
    • KEYNOTE-034
    First Posted:
    Oct 13, 2014
    Last Update Posted:
    May 16, 2022
    Last Verified:
    Apr 1, 2022
    Individual Participant Data (IPD) Sharing Statement:
    Yes
    Plan to Share IPD:
    Yes
    Studies a U.S. FDA-regulated Drug Product:
    Yes
    Studies a U.S. FDA-regulated Device Product:
    No
    Keywords provided by Amgen
    Additional relevant MeSH terms:

    Study Results

    Participant Flow

    Recruitment Details This study was conducted at 134 centers in Australia, Canada, Europe, South Africa, South Korea, and the United States. Phase 1b was an open-label, single-arm study and Phase 3 was a randomized, double-blind, placebo-controlled study.
    Pre-assignment Detail In Phase 3 participants were randomized equally to 1 of 2 arms. Randomization was stratified by stage of disease: less advanced stages (IIIB, IIIC, and IVM1a) versus more advanced stages (IVM1b and IVM1c) and by prior serine/threonine protein kinase B-Raf (BRAF) inhibitor therapy (no prior BRAF inhibitor versus BRAF inhibitor with or without mitogen-activated extracellular signal-regulated kinase [MEK] inhibitor).
    Arm/Group Title Phase 1b: Talimogene Laherparepvec + Pembrolizumab Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ plaque-forming units (PFU)/mL by intralesional injection on day 1 of week 1. Subsequent doses of talimogene laherparepvec at up to 4 mL of 10⁸ PFU/mL began 3 weeks after the first dose and were administered every 2 weeks until disappearance of injectable lesions, complete response (CR), confirmed disease progression (PD) per modified Immune-related Response Criteria (irRC), intolerance of study treatment, 24 months from the date of the first dose of pembrolizumab, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 2 weeks starting at the time of the third dose of talimogene laherparepvec (week 6) until confirmed PD per modified irRC, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Period Title: Overall Study
    STARTED 21 346 346
    Received Talimogene Laherparepvec/Placebo 21 345 343
    Received Pembrolizumab 21 345 343
    COMPLETED 0 0 0
    NOT COMPLETED 21 346 346

    Baseline Characteristics

    Arm/Group Title Phase 1b: Talimogene Laherparepvec + Pembrolizumab Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab Total
    Arm/Group Description Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ plaque-forming units (PFU)/mL by intralesional injection on day 1 of week 1. Subsequent doses of talimogene laherparepvec at up to 4 mL of 10⁸ PFU/mL began 3 weeks after the first dose and were administered every 2 weeks until disappearance of injectable lesions, complete response (CR), confirmed disease progression (PD) per modified Immune-related Response Criteria (irRC), intolerance of study treatment, 24 months from the date of the first dose of pembrolizumab, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 2 weeks starting at the time of the third dose of talimogene laherparepvec (week 6) until confirmed PD per modified irRC, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Total of all reporting groups
    Overall Participants 21 346 346 713
    Age (years) [Mean (Standard Deviation) ]
    Mean (Standard Deviation) [years]
    60.2
    (13.4)
    62.3
    (14.5)
    63.1
    (13.7)
    62.6
    (14.1)
    Sex: Female, Male (Count of Participants)
    Female
    13
    61.9%
    127
    36.7%
    147
    42.5%
    287
    40.3%
    Male
    8
    38.1%
    219
    63.3%
    199
    57.5%
    426
    59.7%
    Ethnicity (NIH/OMB) (Count of Participants)
    Hispanic or Latino
    0
    0%
    9
    2.6%
    13
    3.8%
    22
    3.1%
    Not Hispanic or Latino
    21
    100%
    337
    97.4%
    331
    95.7%
    689
    96.6%
    Unknown or Not Reported
    0
    0%
    0
    0%
    2
    0.6%
    2
    0.3%
    Race/Ethnicity, Customized (Count of Participants)
    American Indian or Alaska Native
    0
    0%
    0
    0%
    0
    0%
    0
    0%
    Asian
    0
    0%
    4
    1.2%
    7
    2%
    11
    1.5%
    Black (or African American)
    0
    0%
    1
    0.3%
    2
    0.6%
    3
    0.4%
    Native Hawaiian or Other Pacific Islander
    0
    0%
    0
    0%
    0
    0%
    0
    0%
    White
    21
    100%
    335
    96.8%
    327
    94.5%
    683
    95.8%
    Other
    0
    0%
    6
    1.7%
    10
    2.9%
    16
    2.2%
    Disease Stage per the American Joint Committee on Cancer (AJCC) 7th Edition (Count of Participants)
    Stage IIIB - IVM1a
    9
    42.9%
    169
    48.8%
    169
    48.8%
    347
    48.7%
    Stage IVM1b/c
    12
    57.1%
    177
    51.2%
    177
    51.2%
    366
    51.3%
    Prior Serine/Threonine Protein Kinase B-Raf (BRAF) Inhibitor Therapy (Count of Participants)
    Yes
    29
    138.1%
    29
    8.4%
    58
    16.8%
    No
    317
    1509.5%
    317
    91.6%
    634
    183.2%
    Programmed Cell Death-1 Ligand 1 (PD-L1) Status (Count of Participants)
    Positive
    17
    81%
    218
    63%
    231
    66.8%
    466
    65.4%
    Not Positive
    4
    19%
    128
    37%
    115
    33.2%
    247
    34.6%
    BRAF V600 Mutation Status (Count of Participants)
    Mutation
    4
    19%
    116
    33.5%
    124
    35.8%
    244
    34.2%
    Mutation not present
    17
    81%
    215
    62.1%
    211
    61%
    443
    62.1%
    Missing/unknown
    0
    0%
    15
    4.3%
    11
    3.2%
    26
    3.6%

    Outcome Measures

    1. Primary Outcome
    Title Phase 1b: Number of Participants With Dose-limiting Toxicities (DLTs)
    Description A DLT was defined as any toxicity related to study drug which met any of the following criteria based on Common Terminology Criteria for Adverse Events (CTCAE) version 4.0: Grade 4 non-hematologic toxicity. Grade 3 or higher pneumonitis. Grade 3 non-hematologic toxicity lasting > 3 days despite optimal supportive care, excluding grade 3 fatigue. Any grade 3 or higher non-hematologic laboratory value if medical intervention was required, or the abnormality lead to hospitalization, or the abnormality persisted for > 1 week. Febrile neutropenia grade 3 or grade 4. Thrombocytopenia < 25 x 10^9/L if associated with a bleeding event which does not result in hemodynamic instability but required an elective platelet infusion, or a life-threatening bleeding event which resulted in urgent intervention and admission to intensive care unit. Grade 5 toxicity (ie, death). Any other intolerable toxicity leading to permanent discontinuation of talimogene laherparepvec or pembrolizumab.
    Time Frame The DLT evaluation period was 6 weeks from the initial administration of pembrolizumab (week 6 to 12).

    Outcome Measure Data

    Analysis Population Description
    The DLT analysis set included DLT-evaluable participants enrolled in Phase 1b who had the opportunity to be on treatment for at least 6 weeks from the initial dose of pembrolizumab and received at least 2 doses of talimogene laherparepvec and 2 doses of pembrolizumab in combination (ie, on the same day), or those who otherwise experienced a DLT within 6 weeks after starting the combination therapy.
    Arm/Group Title Phase 1b: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ plaque-forming units (PFU)/mL by intralesional injection on day 1 of week 1. Subsequent doses of talimogene laherparepvec at up to 4 mL of 10⁸ PFU/mL began 3 weeks after the first dose and were administered every 2 weeks until disappearance of injectable lesions, complete response (CR), confirmed disease progression (PD) per modified Immune-related Response Criteria (irRC), intolerance of study treatment, 24 months from the date of the first dose of pembrolizumab, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 2 weeks starting at the time of the third dose of talimogene laherparepvec (week 6) until confirmed PD per modified irRC, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 21
    Count of Participants [Participants]
    0
    0%
    2. Primary Outcome
    Title Phase 3: Progression Free Survival (PFS) by Blinded Independent Central Review (BICR) Assessed Using Modified RECIST 1.1
    Description PFS per modified Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 is defined as the interval from randomization to the earlier event of progressive disease (PD) per modified RECIST 1.1 or death from any cause. PD: Increase in size of target lesions from nadir by ≥ 20% and ≥ 5 mm absolute increase above nadir, or the appearance of a new lesion. Median PFS was calculated using the Kaplan-Meier method. Participants without an event were censored at their last evaluable tumor assessment if available; otherwise on their randomization date. The primary analysis of PFS was specified to be conducted when 407 PFS events had occurred (data cut-off date 02 March 2020).
    Time Frame From randomization until the data-cut-off date of 02 March 2020; median (range) time on follow-up was 25.5 (0.6, 44.7) months in the Placebo + Pembrolizumab arm and 25.6 (0.3, 45.8) months in the Talimogene Laherparepvec + Pembrolizumab arm.

    Outcome Measure Data

    Analysis Population Description
    All participants randomized in Phase 3.
    Arm/Group Title Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 346 346
    Median (95% Confidence Interval) [months]
    8.5
    14.3
    Statistical Analysis 1
    Statistical Analysis Overview Comparison Group Selection Phase 1b: Talimogene Laherparepvec + Pembrolizumab, Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Comments
    Type of Statistical Test Superiority
    Comments
    Statistical Test of Hypothesis p-Value 0.13
    Comments
    Method Stratified log-rank test
    Comments Stratified by randomization factors (disease stage, prior BRAF inhibitor therapy) and baseline PD-L1 status.
    Method of Estimation Estimation Parameter Hazard Ratio (HR)
    Estimated Value 0.86
    Confidence Interval (2-Sided) 95%
    0.71 to 1.04
    Parameter Dispersion Type:
    Value:
    Estimation Comments Cox proportional hazards model stratified by randomization factors (disease stage, prior BRAF inhibitor therapy) and baseline PD-L1 status.
    3. Primary Outcome
    Title Phase 3: Overall Survival
    Description Overall survival (OS) is defined as the interval from randomization to death from any cause. Median overall survival was calculated using the Kaplan-Meier method. Participants without an event were censored at their last known alive date.
    Time Frame From randomization until the end of study; median (range) time on follow-up was 34.8 (0.6, 58.3) months in the Placebo + Pembrolizumab arm and 36.8 (0.3, 58.4) months in the Talimogene Laherparepvec + Pembrolizumab arm.

    Outcome Measure Data

    Analysis Population Description
    All participants randomized in Phase 3
    Arm/Group Title Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 346 346
    Median (95% Confidence Interval) [months]
    NA
    NA
    Statistical Analysis 1
    Statistical Analysis Overview Comparison Group Selection Phase 1b: Talimogene Laherparepvec + Pembrolizumab, Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Comments
    Type of Statistical Test Superiority
    Comments
    Statistical Test of Hypothesis p-Value 0.77
    Comments
    Method Stratified log-rank test
    Comments Stratified by randomization factors (disease stage, prior BRAF inhibitor therapy) and baseline PD-L1 status.
    Method of Estimation Estimation Parameter Hazard Ratio (HR)
    Estimated Value 0.97
    Confidence Interval (2-Sided) 95%
    0.77 to 1.21
    Parameter Dispersion Type:
    Value:
    Estimation Comments Cox proportional hazards model stratified by randomization factors (disease stage, prior BRAF inhibitor therapy) and baseline PD-L1 status.
    4. Secondary Outcome
    Title Phase 1b: Objective Response Rate (ORR)
    Description ORR is defined as the percentage of participants with a best overall response of complete response (CR) or partial response (PR) using the modified Immune-related Response Criteria (irRC), by Investigator assessment. CR was defined as the disappearance of all lesions; PR was defined as a decrease in tumor area ≥ 50% relative to baseline, response must have been confirmed by a second, consecutive assessment at least 4 weeks apart. Radiographic imaging for assessment of lesions was performed using computed tomography (CT), positron emission tomography (PET), magnetic resonance imaging (MRI), or ultrasound. Clinical measurement of cutaneous, subcutaneous, and palpable nodal tumor lesions was conducted with calipers.
    Time Frame Tumor assessments were performed at week 6 (prior to initiation of pembrolizumab), week 18, and every 12 weeks thereafter until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 58.6 (1.4, 61.6) months.

    Outcome Measure Data

    Analysis Population Description
    All participants enrolled in Phase 1b who received ≥ 1 dose of talimogene laherparepvec or pembrolizumab. Participants with no post-baseline tumor assessments were counted as non-responders.
    Arm/Group Title Phase 1b: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ plaque-forming units (PFU)/mL by intralesional injection on day 1 of week 1. Subsequent doses of talimogene laherparepvec at up to 4 mL of 10⁸ PFU/mL began 3 weeks after the first dose and were administered every 2 weeks until disappearance of injectable lesions, complete response (CR), confirmed disease progression (PD) per modified Immune-related Response Criteria (irRC), intolerance of study treatment, 24 months from the date of the first dose of pembrolizumab, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 2 weeks starting at the time of the third dose of talimogene laherparepvec (week 6) until confirmed PD per modified irRC, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 21
    Number (95% Confidence Interval) [percentage of participants]
    61.9
    294.8%
    5. Secondary Outcome
    Title Phase 1b: Best Overall Response (BOR)
    Description Best overall response is defined as the best overall visit response in the following order: CR, PR, stable disease (SD), progressive disease (PD), or unevaluable (UE), based on investigator assessment using the modified irRC up to the start of any subsequent anti-cancer therapy. CR was defined as the disappearance of all lesions; PR was defined as a decrease in tumor area ≥ 50% relative to baseline; PD was defined as an increase in tumor area ≥ 25% relative to nadir; and SD was defined as any outcome not meeting the criteria for response or PD with ≥ 77 days elapsed after enrollment. Responses and PD must have been confirmed by a second, consecutive assessment at least 4 weeks apart.
    Time Frame Tumor assessments were performed at week 6 (prior to initiation of pembrolizumab), week 18, and every 12 weeks thereafter until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 58.6 (1.4, 61.6) months.

    Outcome Measure Data

    Analysis Population Description
    All participants enrolled in Phase 1b who received ≥ 1 dose of talimogene laherparepvec or pembrolizumab.
    Arm/Group Title Phase 1b: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ plaque-forming units (PFU)/mL by intralesional injection on day 1 of week 1. Subsequent doses of talimogene laherparepvec at up to 4 mL of 10⁸ PFU/mL began 3 weeks after the first dose and were administered every 2 weeks until disappearance of injectable lesions, complete response (CR), confirmed disease progression (PD) per modified Immune-related Response Criteria (irRC), intolerance of study treatment, 24 months from the date of the first dose of pembrolizumab, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 2 weeks starting at the time of the third dose of talimogene laherparepvec (week 6) until confirmed PD per modified irRC, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 21
    Complete Response (CR)
    9
    42.9%
    Partial Response (PR)
    4
    19%
    Stable Disease (SD)
    1
    4.8%
    Progressive Disease (PD)
    6
    28.6%
    Unable to Evaluate (UE)
    1
    4.8%
    6. Secondary Outcome
    Title Phase 1b: Durable Response Rate (DRR)
    Description DRR is defined as the percentage of participants with a best overall response of CR or PR using the modified irRC per Investigator assessment with a duration of response of at least 6 months. CR was defined as the disappearance of all lesions; PR was defined as a decrease in tumor area ≥ 50% relative to baseline, response must have been confirmed by a second, consecutive assessment at least 4 weeks apart.
    Time Frame Tumor assessments were performed at week 6 (prior to initiation of pembrolizumab), week 18, and every 12 weeks thereafter until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 58.6 (1.4, 61.6) months.

    Outcome Measure Data

    Analysis Population Description
    All participants enrolled in Phase 1b who received ≥ 1 dose of talimogene laherparepvec or pembrolizumab.
    Arm/Group Title Phase 1b: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ plaque-forming units (PFU)/mL by intralesional injection on day 1 of week 1. Subsequent doses of talimogene laherparepvec at up to 4 mL of 10⁸ PFU/mL began 3 weeks after the first dose and were administered every 2 weeks until disappearance of injectable lesions, complete response (CR), confirmed disease progression (PD) per modified Immune-related Response Criteria (irRC), intolerance of study treatment, 24 months from the date of the first dose of pembrolizumab, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 2 weeks starting at the time of the third dose of talimogene laherparepvec (week 6) until confirmed PD per modified irRC, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 21
    Number (95% Confidence Interval) [percentage of participants]
    57.1
    271.9%
    7. Secondary Outcome
    Title Phase 1b: Duration of Response (DOR)
    Description Duration of response (DOR) is defined as the time from the date of an initial response (CR or PR) that is subsequently confirmed to the earlier of confirmed PD or death. Participants who had not ended their response at the time of analysis were censored at their last evaluable tumor assessment before start of the first subsequent anticancer therapy. CR was defined as the disappearance of all lesions; PR was defined as a decrease in tumor area ≥ 50% relative to baseline; PD was defined as an increase in tumor area ≥ 25% relative to nadir. Response and PD must have been confirmed by a second, consecutive assessment at least 4 weeks apart.
    Time Frame Tumor assessments were performed at week 6 (prior to initiation of pembrolizumab), week 18, and every 12 weeks thereafter until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 58.6 (1.4, 61.6) months.

    Outcome Measure Data

    Analysis Population Description
    All participants enrolled in Phase 1b who received ≥ 1 dose of talimogene laherparepvec or pembrolizumab with a CR or PR.
    Arm/Group Title Phase 1b: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ plaque-forming units (PFU)/mL by intralesional injection on day 1 of week 1. Subsequent doses of talimogene laherparepvec at up to 4 mL of 10⁸ PFU/mL began 3 weeks after the first dose and were administered every 2 weeks until disappearance of injectable lesions, complete response (CR), confirmed disease progression (PD) per modified Immune-related Response Criteria (irRC), intolerance of study treatment, 24 months from the date of the first dose of pembrolizumab, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 2 weeks starting at the time of the third dose of talimogene laherparepvec (week 6) until confirmed PD per modified irRC, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 13
    Median (95% Confidence Interval) [months]
    NA
    8. Secondary Outcome
    Title Phase 1b: Disease Control Rate (DCR)
    Description DCR is defined as the percentage of participants with a best overall response of CR, PR, or SD using the modified irRC per Investigator assessment. CR was defined as the disappearance of all lesions; PR was defined as a decrease in tumor area ≥ 50% relative to baseline, response must have been confirmed by a second, consecutive assessment at least 4 weeks apart; and SD was defined as any outcome not meeting the criteria for response or PD with ≥ 84 days elapsed after enrollment.
    Time Frame Tumor assessments were performed at week 6 (prior to initiation of pembrolizumab), week 18, and every 12 weeks thereafter until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 58.6 (1.4, 61.6) months.

    Outcome Measure Data

    Analysis Population Description
    All participants enrolled in Phase 1b who received ≥ 1 dose of talimogene laherparepvec or pembrolizumab.
    Arm/Group Title Phase 1b: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ plaque-forming units (PFU)/mL by intralesional injection on day 1 of week 1. Subsequent doses of talimogene laherparepvec at up to 4 mL of 10⁸ PFU/mL began 3 weeks after the first dose and were administered every 2 weeks until disappearance of injectable lesions, complete response (CR), confirmed disease progression (PD) per modified Immune-related Response Criteria (irRC), intolerance of study treatment, 24 months from the date of the first dose of pembrolizumab, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 2 weeks starting at the time of the third dose of talimogene laherparepvec (week 6) until confirmed PD per modified irRC, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 21
    Number (95% Confidence Interval) [percentage of participants]
    66.7
    317.6%
    9. Secondary Outcome
    Title Phase 1b: Progression-free Survival (PFS)
    Description Progression-free survival is defined as the time from first dose to the earlier event of confirmed PD per modified irRC or death from any cause. PFS was estimated using the Kaplan-Meier method. Participants without an event were censored at their last evaluable tumor assessment.
    Time Frame From first dose until the end of study; median (range) time on follow-up was 70.6 (1.4, 74.5) months.

    Outcome Measure Data

    Analysis Population Description
    All participants enrolled in Phase 1b who received ≥ 1 dose of talimogene laherparepvec or pembrolizumab.
    Arm/Group Title Phase 1b: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ plaque-forming units (PFU)/mL by intralesional injection on day 1 of week 1. Subsequent doses of talimogene laherparepvec at up to 4 mL of 10⁸ PFU/mL began 3 weeks after the first dose and were administered every 2 weeks until disappearance of injectable lesions, complete response (CR), confirmed disease progression (PD) per modified Immune-related Response Criteria (irRC), intolerance of study treatment, 24 months from the date of the first dose of pembrolizumab, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 2 weeks starting at the time of the third dose of talimogene laherparepvec (week 6) until confirmed PD per modified irRC, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 21
    Median (95% Confidence Interval) [months]
    NA
    10. Secondary Outcome
    Title Phase 1b: Overall Survival (OS)
    Description Overall survival is defined as the interval from first dose to death from any cause. OS was estimated using the Kaplan-Meier method. Participants without an event were censored at their last known alive date.
    Time Frame From first dose until the end of study; median (range) time on follow-up was 70.6 (1.4, 74.5) months.

    Outcome Measure Data

    Analysis Population Description
    All participants enrolled in Phase 1b who received ≥ 1 dose of talimogene laherparepvec or pembrolizumab
    Arm/Group Title Phase 1b: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ plaque-forming units (PFU)/mL by intralesional injection on day 1 of week 1. Subsequent doses of talimogene laherparepvec at up to 4 mL of 10⁸ PFU/mL began 3 weeks after the first dose and were administered every 2 weeks until disappearance of injectable lesions, complete response (CR), confirmed disease progression (PD) per modified Immune-related Response Criteria (irRC), intolerance of study treatment, 24 months from the date of the first dose of pembrolizumab, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 2 weeks starting at the time of the third dose of talimogene laherparepvec (week 6) until confirmed PD per modified irRC, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 21
    Median (95% Confidence Interval) [months]
    NA
    11. Secondary Outcome
    Title Phase 3: Complete Response Rate Assessed Using Modified irRC-RECIST (iCRR)
    Description Complete response rate per modified Immune-related Response Criteria (irRC) simulating RECIST 1.1 (irRC-RECIST) is defined as the percentage of participants with a best overall response of complete response assessed using the modified irRC-RECIST (iCR) evaluated by blinded independent central review. iCR: Disappearance of all lesions (whether measurable or not and whether baseline or new) and confirmation by a repeat, consecutive assessment at least 4 weeks after the criteria were first met. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. Modifications to the irRC-RECIST 1.1 included an increase in the total number of target lesions and new measurable lesions to 10 with a maximum of 5 target lesions per organ, and target lesions must have been measurable by CT or MRI only.
    Time Frame Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.

    Outcome Measure Data

    Analysis Population Description
    All participants randomized in Phase 3
    Arm/Group Title Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 346 346
    Number (95% Confidence Interval) [percentage of participants]
    8.1
    38.6%
    14.5
    4.2%
    Statistical Analysis 1
    Statistical Analysis Overview Comparison Group Selection Phase 1b: Talimogene Laherparepvec + Pembrolizumab, Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Comments
    Type of Statistical Test Other
    Comments
    Statistical Test of Hypothesis p-Value 0.012
    Comments
    Method Regression, Logistic
    Comments Logistic regression stratified by randomization stratification factors (disease stage and prior BRAF inhibitor therapy) and the baseline PD-L1 status.
    Method of Estimation Estimation Parameter Odds Ratio (OR)
    Estimated Value 1.88
    Confidence Interval (2-Sided) 95%
    1.15 to 3.07
    Parameter Dispersion Type:
    Value:
    Estimation Comments Adjusted odds ratio estimated using logistic regression with randomization stratification factors and baseline PD-L1 status.
    12. Secondary Outcome
    Title Phase 3: Progression Free Survival Assessed Using Modified irRC-RECIST (iPFS)
    Description PFS per modified irRC-RECIST is defined as the interval from randomization to the earlier event of progressive disease assessed by modified irRC-RECIST (iPD) evaluated by blinded independent central review, or death from any cause. iPD: Increase in tumor burden ≥ 20% and at least 5 mm absolute increase relative to nadir (minimum recorded tumor burden) confirmed by a repeat, consecutive assessment at least 4 weeks after the initial detection. Median iPFS was calculated using the Kaplan-Meier method. Participants without an event were censored at their last evaluable tumor assessment if available; otherwise on their randomization date. The primary analysis of iPFS was specified to be conducted when 256 iPFS events had occurred (data cut-off date 29 September 2020).
    Time Frame From randomization until the data cut-off date of 29 September 2020; median time on follow-up was 30.6 (0.6, 53.0) months in the Placebo + Pembrolizumab arm and 31.4 (0.3, 52.5) months in the Talimogene Laherparepvec + Pembrolizumab arm.

    Outcome Measure Data

    Analysis Population Description
    All participants randomized in Phase 3
    Arm/Group Title Phase 3 : Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 346 346
    Median (95% Confidence Interval) [months]
    25.3
    NA
    Statistical Analysis 1
    Statistical Analysis Overview Comparison Group Selection Phase 1b: Talimogene Laherparepvec + Pembrolizumab, Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Comments
    Type of Statistical Test Other
    Comments
    Statistical Test of Hypothesis p-Value 0.14
    Comments
    Method Stratified log-rank test
    Comments Stratified by randomization factors (disease stage, prior BRAF inhibitor therapy) and baseline PD-L1 status.
    Method of Estimation Estimation Parameter Hazard Ratio (HR)
    Estimated Value 1.05
    Confidence Interval (2-Sided) 95%
    0.82 to 1.34
    Parameter Dispersion Type:
    Value:
    Estimation Comments Cox proportional hazards model stratified by randomization factors (disease stage, prior BRAF inhibitor therapy) and baseline PD-L1 status.
    13. Secondary Outcome
    Title Phase 3: Overall Survival Excluding Stage IVM1c Participants
    Description Overall survival is defined as the interval from randomization to death from any cause. Median OS was calculated using the Kaplan-Meier method. Participants without an event were censored at the last known alive date.
    Time Frame From randomization until the end of study; median (range) time on follow-up was 34.8 (0.6, 58.3) months in the Placebo + Pembrolizumab arm and 36.8 (0.3, 58.4) months in the Talimogene Laherparepvec + Pembrolizumab arm.

    Outcome Measure Data

    Analysis Population Description
    Participants randomized in Phase 3 with stage IIIB to IVM1a/b.
    Arm/Group Title Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 203 201
    Median (95% Confidence Interval) [months]
    NA
    NA
    Statistical Analysis 1
    Statistical Analysis Overview Comparison Group Selection Phase 1b: Talimogene Laherparepvec + Pembrolizumab, Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Comments
    Type of Statistical Test Other
    Comments
    Statistical Test of Hypothesis p-Value 0.47
    Comments
    Method Stratified log-rank test
    Comments Stratified by randomization factors (disease stage, prior BRAF inhibitor therapy) and baseline PD-L1 status.
    Method of Estimation Estimation Parameter Hazard Ratio (HR)
    Estimated Value 0.88
    Confidence Interval (2-Sided) 95%
    0.63 to 1.24
    Parameter Dispersion Type:
    Value:
    Estimation Comments Cox proportional hazards model stratified by randomization factors (disease stage, prior BRAF inhibitor therapy) and baseline PD-L1 status.
    14. Secondary Outcome
    Title Phase 3: Objective Response Rate Assessed Using Modified RECIST 1.1
    Description ORR is defined as the percentage of participants with a best overall response of complete response (CR) or partial response (PR) assessed using modified RECIST version 1.1, evaluated by blinded independent central review. CR was defined as the disappearance of all lesions except lymph node short axis < 10 mm; PR was defined as a ≥ 30% reduction in sum of diameters in target lesions. Confirmation of CR or PR was not required. Modifications to conventional RECIST 1.1 included the following: target lesions were measurable on CT or MRI; otherwise, they were considered as nontarget lesions. A maximum of 10 target lesions was allowed with up to 5 per organ.
    Time Frame Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.

    Outcome Measure Data

    Analysis Population Description
    All participants randomized in Phase 3; Participants with no post-baseline tumor assessments were counted as non-responders.
    Arm/Group Title Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 346 346
    Number (95% Confidence Interval) [percentage of participants]
    41.3
    196.7%
    48.6
    14%
    Statistical Analysis 1
    Statistical Analysis Overview Comparison Group Selection Phase 1b: Talimogene Laherparepvec + Pembrolizumab, Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Comments
    Type of Statistical Test Other
    Comments
    Statistical Test of Hypothesis p-Value 0.081
    Comments
    Method Regression, Logistic
    Comments Logistic regression stratified by randomization stratification factors (disease stage and prior BRAF inhibitor therapy) and the baseline PD-L1 status.
    Method of Estimation Estimation Parameter Odds Ratio (OR)
    Estimated Value 1.32
    Confidence Interval (2-Sided) 95%
    0.97 to 1.79
    Parameter Dispersion Type:
    Value:
    Estimation Comments Adjusted odds ratio estimated using logistic regression with randomization stratification factors and baseline PD-L1 status.
    15. Secondary Outcome
    Title Phase 3: Best Overall Response Assessed Using Modified RECIST 1.1
    Description BOR is defined as the best overall visit response up to and including the first overall visit response of PD in the following order: CR, PR, SD, non-CR/Non-PD (NN), PD or UE per modified RECIST 1.1, evaluated by BICR. CR: Disappearance of all lesions except lymph node short axis < 10 mm; PR: ≥ 30% reduction in sum of diameters in target lesions. Confirmation of CR or PR was not required; NN: Persistence of ≥ 1 non-target lesions and/or maintenance of tumor marker level above normal limits; SD: Neither sufficient shrinkage of target lesions to qualify for CR or PR nor sufficient increase to qualify for PD and ≥ 84 days from randomization; PD: Increase from nadir by ≥ 20% or ≥ 5 mm of target lesions or any new lesion; Missing: No postbaseline assessment, or assessments on or after the start of first subsequent anticancer therapy, including complete or partial removal/reduction of any target lesion which contained melanoma on pathology evaluation or pathology results were unknown.
    Time Frame Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.

    Outcome Measure Data

    Analysis Population Description
    All participants randomized in Phase 3
    Arm/Group Title Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 346 346
    Complete response (CR)
    40
    190.5%
    62
    17.9%
    Partial response (PR)
    103
    490.5%
    106
    30.6%
    Stable disease (SD)
    30
    142.9%
    28
    8.1%
    Non-CR/Non-PD (NN)
    16
    76.2%
    11
    3.2%
    Progressive disease (PD)
    120
    571.4%
    106
    30.6%
    Unevaluable (UE)
    11
    52.4%
    3
    0.9%
    Missing
    26
    123.8%
    30
    8.7%
    16. Secondary Outcome
    Title Phase 3: Durable Response Rate (DRR) Assessed Using Modified RECIST 1.1
    Description DRR is defined as the percentage of participants with a CR or PR per modified RECIST 1.1 evaluated by blinded independent central review, with a duration of response of ≥ 6 months. CR was defined as the disappearance of all lesions except lymph node short axis < 10 mm; PR was defined as a ≥ 30% reduction in sum of diameters in target lesions. Confirmation of CR or PR was not required.
    Time Frame Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.

    Outcome Measure Data

    Analysis Population Description
    All participants randomized in Phase 3
    Arm/Group Title Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 346 346
    Number (95% Confidence Interval) [percentage of participants]
    34.1
    162.4%
    42.2
    12.2%
    Statistical Analysis 1
    Statistical Analysis Overview Comparison Group Selection Phase 1b: Talimogene Laherparepvec + Pembrolizumab, Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Comments
    Type of Statistical Test Other
    Comments
    Statistical Test of Hypothesis p-Value 0.039
    Comments
    Method Regression, Logistic
    Comments Logistic regression stratified by randomization stratification factors (disease stage and prior BRAF inhibitor therapy) and the baseline PD-L1 status.
    Method of Estimation Estimation Parameter Odds Ratio (OR)
    Estimated Value 1.39
    Confidence Interval (2-Sided) 95%
    1.02 to 1.90
    Parameter Dispersion Type:
    Value:
    Estimation Comments Adjusted odds ratio estimated using logistic regression with randomization stratification factors and baseline PD-L1 status.
    17. Secondary Outcome
    Title Phase 3: Duration of Response (DOR) Assessed Using Modified RECIST 1.1
    Description Duration of response (DOR) is defined as the time from the date of an initial response of CR or PR to the earlier of PD per modified RECIST 1.1, or death. Participants who had not ended their response at the time of analysis were censored at their last evaluable tumor assessment date before start of the first subsequent anticancer therapy. CR was defined as the disappearance of all lesions except lymph node short axis < 10 mm; PR was defined as a ≥ 30% reduction in sum of diameters in target lesions. Confirmation of CR or PR was not required. PD was defined as an increase from nadir by ≥ 20% or ≥ 5 mm absolute increase above nadir of target lesions or appearance of any new lesion.
    Time Frame From randomization until the data cut-off date of 29 September 2020; median time on follow-up was 30.6 (0.6, 53.0) months in the Placebo + Pembrolizumab arm and 31.4 (0.3, 52.5) months in the Talimogene Laherparepvec + Pembrolizumab arm.

    Outcome Measure Data

    Analysis Population Description
    Participants randomized in Phase 3 with a CR or PR per modified RECIST.
    Arm/Group Title Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 143 168
    Median (95% Confidence Interval) [months]
    NA
    43.7
    18. Secondary Outcome
    Title Phase 3: Disease Control Rate (DCR) Assessed Using RECIST 1.1
    Description Disease control rate (DCR) per modified RECIST 1.1 is defined as the percentage of participants with a best overall response of CR, PR or SD evaluated by blinded independent central review. CR was defined as the disappearance of all lesions except lymph node short axis < 10 mm; PR was defined as a ≥ 30% reduction in sum of diameters in target lesions. Confirmation of CR or PR was not required. SD was defined as neither sufficient shrinkage of target lesions to qualify for CR or PR nor sufficient increase to qualify for PD with ≥ 84 days elapsed after randomization.
    Time Frame Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.

    Outcome Measure Data

    Analysis Population Description
    All participants randomized in Phase 3
    Arm/Group Title Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 346 346
    Number (95% Confidence Interval) [percentage of participants]
    50.0
    238.1%
    56.6
    16.4%
    Statistical Analysis 1
    Statistical Analysis Overview Comparison Group Selection Phase 1b: Talimogene Laherparepvec + Pembrolizumab, Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Comments
    Type of Statistical Test Other
    Comments
    Statistical Test of Hypothesis p-Value 0.11
    Comments
    Method Regression, Logistic
    Comments Logistic regression stratified by randomization stratification factors (disease stage and prior BRAF inhibitor therapy) and the baseline PD-L1 status.
    Method of Estimation Estimation Parameter Odds Ratio (OR)
    Estimated Value 1.28
    Confidence Interval (2-Sided) 95%
    0.94 to 1.75
    Parameter Dispersion Type:
    Value:
    Estimation Comments Adjusted odds ratio estimated using logistic regression with randomization stratification factors and baseline PD-L1 status.
    19. Secondary Outcome
    Title Phase 3: Objective Response Rate Assessed Using Modified irRC-RECIST (iORR)
    Description Objective response rate per modified irRC-RECIST is defined as the percentage of participants with a best overall response of iCR or partial response assessed using modified irRC-RECIST (iPR) evaluated by blinded independent central review. iCR: Disappearance of all lesions (whether measurable or not and whether baseline or new) and confirmation by a repeat, consecutive assessment at least 4 weeks from the date first documented. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. iPR: Decrease in tumor burden ≥ 30% relative to baseline confirmed by a consecutive assessment at least 4 weeks after first documentation. Modifications to the irRC-RECIST 1.1 included an increase in the total number of target lesions and new measurable lesions to 10 with a maximum of 5 target lesions per organ, and target lesions must be measurable by CT or MRI only.
    Time Frame Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.

    Outcome Measure Data

    Analysis Population Description
    All participants randomized in Phase 3
    Arm/Group Title Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 346 346
    Number (95% Confidence Interval) [percentage of participants]
    39.9
    190%
    49.1
    14.2%
    Statistical Analysis 1
    Statistical Analysis Overview Comparison Group Selection Phase 1b: Talimogene Laherparepvec + Pembrolizumab, Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Comments
    Type of Statistical Test Other
    Comments
    Statistical Test of Hypothesis p-Value 0.020
    Comments
    Method Regression, Logistic
    Comments Logistic regression stratified by randomization stratification factors (disease stage and prior BRAF inhibitor therapy) and the baseline PD-L1 status.
    Method of Estimation Estimation Parameter Odds Ratio (OR)
    Estimated Value 1.44
    Confidence Interval (2-Sided) 95%
    1.06 to 1.96
    Parameter Dispersion Type:
    Value:
    Estimation Comments Adjusted odds ratio estimated using logistic regression with randomization stratification factors and baseline PD-L1 status.
    20. Secondary Outcome
    Title Phase 3: Best Overall Response Assessed Using Modified irRC-RECIST
    Description BOR is defined as the best overall visit response in the following order: iCR, iPR, stable disease per modified irRC-RECIST (iSD), iPD, or UE per modified irRC-RECIST (iUE), evaluated by BICR. iCR: Disappearance of all lesions confirmed by consecutive assessment ≥ 4 weeks from the date first documented. Reduction of any pathological lymph node to <10 mm. iPR: Decrease in tumor burden ≥ 30% relative to baseline confirmed ≥ 4 weeks after first documentation. iPD: Increase in tumor burden ≥ 20 % and at least 5 mm absolute increase relative to nadir confirmed ≥ 4 weeks from initial detection. iSD: Neither sufficient shrinkage to qualify for iCR or iPR nor sufficient increase to qualify for iPD and ≥ 84 days from randomization. Missing: No postbaseline assessment, or assessments after start of first subsequent anticancer therapy, including complete or partial removal/reduction of any target lesion which contained melanoma on pathology evaluation or pathology results were unknown.
    Time Frame Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.

    Outcome Measure Data

    Analysis Population Description
    All participants randomized in Phase 3
    Arm/Group Title Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 346 346
    Complete response (iCR)
    28
    133.3%
    50
    14.5%
    Partial response (iPR)
    110
    523.8%
    120
    34.7%
    Stable disease (iSD)
    57
    271.4%
    51
    14.7%
    Progressive disease (iPD)
    56
    266.7%
    65
    18.8%
    Unevaluable (iUE)
    69
    328.6%
    30
    8.7%
    Missing
    26
    123.8%
    30
    8.7%
    21. Secondary Outcome
    Title Phase 3: Durable Response Rate Assessed Using Modified irRC-RECIST (iDRR)
    Description Durable response rate per modified irRC-RECIST is defined as the percentage of participants with a best overall response of iCR or iPR per modified irRC-RECIST evaluated by blinded independent central review with a duration of response ≥ 6 months. iCR: Disappearance of all lesions (whether measurable or not and whether baseline or new) and confirmation by a repeat, consecutive assessment at least 4 weeks from the date first documented. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. iPR: Decrease in tumor burden ≥ 30% relative to baseline confirmed by a consecutive assessment at least 4 weeks after first documentation.
    Time Frame Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.

    Outcome Measure Data

    Analysis Population Description
    All participants randomized in Phase 3
    Arm/Group Title Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 346 346
    Number (95% Confidence Interval) [percentage of participants]
    34.4
    163.8%
    45.7
    13.2%
    Statistical Analysis 1
    Statistical Analysis Overview Comparison Group Selection Phase 1b: Talimogene Laherparepvec + Pembrolizumab, Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Comments
    Type of Statistical Test Other
    Comments
    Statistical Test of Hypothesis p-Value 0.004
    Comments
    Method Regression, Logistic
    Comments Logistic regression stratified by randomization stratification factors (disease stage and prior BRAF inhibitor therapy) and the baseline PD-L1 status.
    Method of Estimation Estimation Parameter Odds Ratio (OR)
    Estimated Value 1.59
    Confidence Interval (2-Sided) 95%
    1.16 to 2.17
    Parameter Dispersion Type:
    Value:
    Estimation Comments Adjusted odds ratio estimated using logistic regression with randomization stratification factors and baseline PD-L1 status.
    22. Secondary Outcome
    Title Phase 3: Duration of Response Assessed Using Modified irRC-RECIST (iDOR)
    Description Duration of response per modified irRC-RECIST is defined as the time from the date of an initial response of iCR or iPR that was subsequently confirmed to the earlier of iPD per modified irRC-RECIST evaluated by blinded independent central review, or death. Participants who had not ended their response at the time of analysis were censored at their last evaluable tumor assessment date before the start of the first subsequent anticancer therapy. iCR: Disappearance of all lesions (whether measurable or not and whether baseline or new) and confirmation by a repeat, consecutive assessment at least 4 weeks from the date first documented. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. iPR: Decrease in tumor burden ≥ 30% relative to baseline confirmed by a consecutive assessment at least 4 weeks after first documentation.
    Time Frame From randomization until the data cut-off date of 29 September 2020; median time on follow-up was 30.6 (0.6, 53.0) months in the Placebo + Pembrolizumab arm and 31.4 (0.3, 52.5) months in the Talimogene Laherparepvec + Pembrolizumab arm.

    Outcome Measure Data

    Analysis Population Description
    Participants randomized in Phase 3 with a iCR or iPR per modified irRC-RECIST.
    Arm/Group Title Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 138 170
    Median (95% Confidence Interval) [months]
    NA
    43.7
    23. Secondary Outcome
    Title Phase 3: Disease Control Rate Assessed Using Modified irRC-RECIST (iDCR)
    Description Disease control rate per modified irRC-RECIST is defined as the percentage of participants with a best overall response of iCR, iCR, or iSD assessed using modified irRC-RECIST evaluated by blinded independent central review. iCR: Disappearance of all lesions (whether measurable or not and whether baseline or new) and confirmation by a repeat, consecutive assessment at least 4 weeks from the date first documented. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to <10 mm. iPR: Decrease in tumor burden ≥ 30% relative to baseline confirmed by a consecutive assessment at least 4 weeks after first documentation. iSD: Neither sufficient shrinkage to qualify for iCR or iPR nor sufficient increase to qualify for iPD with ≥ 84 days elapsed after randomization.
    Time Frame Tumor assessments were performed every 12 weeks after initiation of treatment until confirmed PD or start of new anticancer treatment; median (range) time on follow-up was 30.6 (0.6, 53.0) months and 31.4 (0.3, 52.5) months in each group, respectively.

    Outcome Measure Data

    Analysis Population Description
    All participants randomized in Phase 3
    Arm/Group Title Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 346 346
    Number (95% Confidence Interval) [percentage of participants]
    56.4
    268.6%
    63.9
    18.5%
    Statistical Analysis 1
    Statistical Analysis Overview Comparison Group Selection Phase 1b: Talimogene Laherparepvec + Pembrolizumab, Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Comments
    Type of Statistical Test Other
    Comments
    Statistical Test of Hypothesis p-Value 0.058
    Comments
    Method Regression, Logistic
    Comments Logistic regression stratified by randomization stratification factors (disease stage and prior BRAF inhibitor therapy) and the baseline PD-L1 status.
    Method of Estimation Estimation Parameter Odds Ratio (OR)
    Estimated Value 1.35
    Confidence Interval (2-Sided) 95%
    0.99 to 1.85
    Parameter Dispersion Type:
    Value:
    Estimation Comments Adjusted odds ratio estimated using logistic regression with randomization stratification factors and baseline PD-L1 status.
    24. Secondary Outcome
    Title Phase 3: Change From Baseline in European Organisation for Research and Treatment of Cancer Quality of Life Core Module (EORTC QLQ-C30) Global Health Status (GHS)/Quality of Life (QOL) Score
    Description The European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire-C30 (EORTC QLQ-C30) is a 30-question tool used to assess the overall quality of life in cancer patients. It consists of 15 domains: 1 global health status/quality of life scale, 5 functional scales, and 9 symptom scales/items. The global health/QoL scale consists of 2 questions that ask participants to rate their overall health and overall quality of life during the past week on a scale from 1 (very poor) to 7 (excellent). The GHS/QoL subscale score was derived as the mean of each score then transformed to a scale from 0 to 100 where higher scores represent a better health status and a positive change from baseline indicates improvement. The overall change from baseline (calculated from all on-treatment visits) was calculated using a restricted maximum likelihood-based mixed model for repeated measures (MMRM) (see model details in statistical analysis section).
    Time Frame Baseline and day 1 of weeks 3, 6, 9, 12, then every 6 weeks until end of study treatment; median (range) duration of treatment was 39.0 (0.1, 107.3) weeks in Placebo + Pembrolizumab and 54.1 (0.1, 109.6) weeks in Talimogene Laherparepvec + Pembrolizumab.

    Outcome Measure Data

    Analysis Population Description
    Participants randomized in Phase 3 who received at least one dose of study therapy and had both a baseline and at least one on-treatment assessment.
    Arm/Group Title Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 329 328
    Least Squares Mean (Standard Error) [score on a scale]
    -0.20
    (1.02)
    -0.02
    (1.02)
    Statistical Analysis 1
    Statistical Analysis Overview Comparison Group Selection Phase 1b: Talimogene Laherparepvec + Pembrolizumab, Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Comments Mixed Model for Repeated Measures include the fixed and categorical effects of treatment, visit and treatment-by-visit interaction, the fixed and continuous covariates of baseline HRQL score, randomization stratification factors (stage of disease and prior BRAF inhibitor therapy per IVRS) and baseline PD-L1 status (positive and not positive). Random subject effect was modeled using within subject-error correlation structure.
    Type of Statistical Test Other
    Comments
    Statistical Test of Hypothesis p-Value 0.84
    Comments
    Method Mixed Model for Repeated Measures
    Comments
    Method of Estimation Estimation Parameter Difference
    Estimated Value 0.19
    Confidence Interval (2-Sided) 95%
    -1.67 to 2.05
    Parameter Dispersion Type: Standard Error of the Mean
    Value: 0.95
    Estimation Comments
    25. Secondary Outcome
    Title Number of Participants With Treatment-emergent Adverse Events (TEAEs)
    Description An adverse event (AE) is any untoward medical occurrence in a clinical trial subject, including worsening of a pre-existing medical condition. The event does not necessarily have a causal relationship with study treatment. TEAEs include AEs from the first dose of study drug to 30 days after the last dose. A serious adverse event (SAE) is an AE that met at least 1 of the following criteria: fatal life threatening required in-patient hospitalization or prolongation of existing hospitalization resulted in persistent or significant disability/incapacity congenital anomaly/birth defect other medically important serious event. Treatment-emergent SAEs are any SAE occurring from first dose of study drug through 90 days after the last dose or 30 days after the last dose if new anticancer therapy was started, whichever was earlier. AEs were graded for severity using CTCAE version 4.0, where Grade 1 = Mild; Grade 2 = Moderate; Grade 3 = Severe; Grade 4 = Life-threatening; Grade 5 = Fatal.
    Time Frame From first dose to 30 days after last dose (90 days for SAEs); median (range) duration was 48 (5.1, 110.1) weeks in Phase 1b, 39 (0.1, 107.3) weeks in Placebo + Pembrolizumab and 56 (0.1, 109.6) weeks in Phase 3 Talimogene Laherparepvec + Pembrolizumab.

    Outcome Measure Data

    Analysis Population Description
    All participants who received at least 1 dose of talimogene laherparepvec or pembrolizumab. One participant who was randomized in Phase 3 to receive placebo received talimogene laherparepvec; thus, the Safety Analysis Set consisted of 344 participants in the Talimogene Laherparepvec + Pembrolizumab group and 344 participants in the Placebo + Pembrolizumab group.
    Arm/Group Title Phase 1b: Talimogene Laherparepvec + Pembrolizumab Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ plaque-forming units (PFU)/mL by intralesional injection on day 1 of week 1. Subsequent doses of talimogene laherparepvec at up to 4 mL of 10⁸ PFU/mL began 3 weeks after the first dose and were administered every 2 weeks until disappearance of injectable lesions, complete response (CR), confirmed disease progression (PD) per modified Immune-related Response Criteria (irRC), intolerance of study treatment, 24 months from the date of the first dose of pembrolizumab, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 2 weeks starting at the time of the third dose of talimogene laherparepvec (week 6) until confirmed PD per modified irRC, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    Measure Participants 21 344 344
    Any treatment-emergent adverse events
    21
    100%
    331
    95.7%
    338
    97.7%
    Grade ≥ 2
    20
    95.2%
    279
    80.6%
    306
    88.4%
    Grade ≥ 3
    13
    61.9%
    151
    43.6%
    161
    46.5%
    Grade ≥ 4
    2
    9.5%
    29
    8.4%
    33
    9.5%
    Serious adverse events
    8
    38.1%
    141
    40.8%
    154
    44.5%
    Leading to discontinuation of talimogene laherparepvec/Placebo
    0
    0%
    24
    6.9%
    26
    7.5%
    Leading to discontinuation of pembrolizumab
    2
    9.5%
    41
    11.8%
    43
    12.4%
    Fatal adverse events
    1
    4.8%
    42
    12.1%
    45
    13%

    Adverse Events

    Time Frame All-cause mortality: From enrollment (Phase 1b) or randomization (Phase 3) to end of study, up to 75 months in Phase 1b and 58 months in Phase 3. SAEs: From first dose of study drug to 90 days after last dose or 30 days after last dose if new anticancer therapy was started. AEs: From first dose to 30 days after last dose; median (range) duration of exposure was 48 (5.1, 110) weeks in Phase 1b, 39 (0.1, 107) weeks in Placebo + Pembrolizumab and 56 (0.1, 110) weeks in T-VEC + Pembrolizumab arm.
    Adverse Event Reporting Description All-cause mortality is reported for all enrolled (Phase 1b) or randomized (Phase 3) participants. Adverse events are reported for all participants who received at least 1 dose of talimogene laherparepvec or pembrolizumab. One participant who was randomized in Phase 3 to receive placebo received talimogene laherparepvec; thus, the Safety Analysis Set consisted of 344 participants in the talimogene laherparepvec + pembrolizumab group and 344 participants in the placebo + pembrolizumab group.
    Arm/Group Title Phase 1b: Talimogene Laherparepvec + Pembrolizumab Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Arm/Group Description Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ plaque-forming units (PFU)/mL by intralesional injection on day 1 of week 1. Subsequent doses of talimogene laherparepvec at up to 4 mL of 10⁸ PFU/mL began 3 weeks after the first dose and were administered every 2 weeks until disappearance of injectable lesions, complete response (CR), confirmed disease progression (PD) per modified Immune-related Response Criteria (irRC), intolerance of study treatment, 24 months from the date of the first dose of pembrolizumab, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 2 weeks starting at the time of the third dose of talimogene laherparepvec (week 6) until confirmed PD per modified irRC, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received up to 4 mL placebo to talimogene laherparepvec by intralesional injection on day 1 of week 0. Subsequent doses of placebo (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, complete response per modified Immune-related Response Criteria simulating Response Evaluation Criteria in Solid Tumors (irRC-RECIST) (iCR), confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of placebo, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first. Participants received talimogene laherparepvec at an initial dose of up to 4 mL 10⁶ PFU/mL by intralesional injection on day 1. Subsequent doses of talimogene laherparepvec at 10⁸ PFU/mL (up to 4 mL) began 3 weeks after the first dose and were administered every 2 weeks until the fifth injection of talimogene laherparepvec (week 9), and then synchronously with pembrolizumab thereafter every 3 weeks until disappearance of injectable lesions, iCR, confirmed iPD per modified irRC-RECIST, intolerance of study treatment, 24 months from the date of the first dose of talimogene laherparepvec, or end of study, whichever occurred first. Participants also received 200 mg pembrolizumab administered intravenously every 3 weeks starting on day 1 of week 0, until confirmed iPD per modified irRC-RECIST, treatment intolerance, 24 months from the first dose, or end of study, whichever occurred first.
    All Cause Mortality
    Phase 1b: Talimogene Laherparepvec + Pembrolizumab Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events
    Total 6/21 (28.6%) 156/346 (45.1%) 146/346 (42.2%)
    Serious Adverse Events
    Phase 1b: Talimogene Laherparepvec + Pembrolizumab Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events
    Total 8/21 (38.1%) 141/344 (41%) 154/344 (44.8%)
    Blood and lymphatic system disorders
    Anaemia 0/21 (0%) 8/344 (2.3%) 9/344 (2.6%)
    Anaemia of malignant disease 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Febrile neutropenia 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Granulomatous lymphadenitis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Lymph node pain 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Lymphadenopathy 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Thrombocytopenia 0/21 (0%) 2/344 (0.6%) 0/344 (0%)
    Cardiac disorders
    Acute coronary syndrome 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Acute myocardial infarction 0/21 (0%) 2/344 (0.6%) 1/344 (0.3%)
    Angina pectoris 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Atrial fibrillation 0/21 (0%) 2/344 (0.6%) 1/344 (0.3%)
    Atrial flutter 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Atrioventricular block second degree 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Cardiac arrest 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Cardiac failure 0/21 (0%) 2/344 (0.6%) 1/344 (0.3%)
    Cardiac failure acute 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Cardiac failure congestive 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Cardiogenic shock 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Left ventricular failure 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Mitral valve prolapse 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Myocardial infarction 0/21 (0%) 3/344 (0.9%) 4/344 (1.2%)
    Myocarditis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Supraventricular tachycardia 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Ear and labyrinth disorders
    Vertigo 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Endocrine disorders
    Addison's disease 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Adrenal insufficiency 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Adrenocortical insufficiency acute 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Endocrine disorder 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Hyperthyroidism 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Hypophysitis 0/21 (0%) 2/344 (0.6%) 0/344 (0%)
    Hypopituitarism 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Lymphocytic hypophysitis 0/21 (0%) 1/344 (0.3%) 2/344 (0.6%)
    Thyroid mass 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Thyroiditis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Eye disorders
    Papilloedema 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Retinal oedema 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Uveitis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Gastrointestinal disorders
    Abdominal pain 0/21 (0%) 1/344 (0.3%) 2/344 (0.6%)
    Abdominal pain upper 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Ascites 0/21 (0%) 2/344 (0.6%) 1/344 (0.3%)
    Autoimmune colitis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Colitis 0/21 (0%) 0/344 (0%) 5/344 (1.5%)
    Constipation 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Diarrhoea 0/21 (0%) 0/344 (0%) 4/344 (1.2%)
    Gastritis 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Gastrointestinal haemorrhage 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Haematochezia 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Haemoperitoneum 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Ileus 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Large intestine polyp 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Mechanical ileus 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Nausea 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Oesophageal motility disorder 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Pancreatitis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Rectal haemorrhage 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Vomiting 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    General disorders
    Asthenia 0/21 (0%) 2/344 (0.6%) 1/344 (0.3%)
    Chest pain 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Chills 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Condition aggravated 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Death 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Disease progression 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Fatigue 0/21 (0%) 1/344 (0.3%) 3/344 (0.9%)
    General physical health deterioration 1/21 (4.8%) 2/344 (0.6%) 1/344 (0.3%)
    Generalised oedema 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Inflammation 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Influenza like illness 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Multiple organ dysfunction syndrome 0/21 (0%) 2/344 (0.6%) 1/344 (0.3%)
    Pain 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Performance status decreased 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Pyrexia 2/21 (9.5%) 4/344 (1.2%) 7/344 (2%)
    Sudden death 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Swelling 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Hepatobiliary disorders
    Autoimmune hepatitis 1/21 (4.8%) 1/344 (0.3%) 1/344 (0.3%)
    Cholecystitis 1/21 (4.8%) 1/344 (0.3%) 1/344 (0.3%)
    Cholecystitis acute 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Cholelithiasis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Hepatic failure 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Hepatitis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Jaundice 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Immune system disorders
    Anaphylactic shock 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Cytokine release syndrome 1/21 (4.8%) 0/344 (0%) 0/344 (0%)
    Infections and infestations
    Abscess 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Anal abscess 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Appendicitis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Atypical pneumonia 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Bronchitis 0/21 (0%) 2/344 (0.6%) 1/344 (0.3%)
    Bronchopulmonary aspergillosis 1/21 (4.8%) 0/344 (0%) 0/344 (0%)
    Cellulitis 1/21 (4.8%) 4/344 (1.2%) 4/344 (1.2%)
    Chorioretinitis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Dermo-hypodermitis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Diverticulitis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Encephalitis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Erysipelas 0/21 (0%) 2/344 (0.6%) 2/344 (0.6%)
    Escherichia sepsis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Extradural abscess 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Gastroenteritis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Herpes zoster 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Infected cyst 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Infection 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Influenza 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Localised infection 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Lower respiratory tract infection 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Lymph gland infection 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Meningitis aseptic 1/21 (4.8%) 0/344 (0%) 0/344 (0%)
    Nasopharyngitis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Periorbital cellulitis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Pneumonia 0/21 (0%) 4/344 (1.2%) 3/344 (0.9%)
    Postoperative wound infection 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Pulmonary sepsis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Pyelonephritis chronic 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Respiratory tract infection 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Scrotal abscess 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Sepsis 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Sinusitis 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Tooth abscess 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Tracheobronchitis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Upper respiratory tract infection 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Ureteritis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Urinary tract infection 0/21 (0%) 3/344 (0.9%) 5/344 (1.5%)
    Urinary tract infection bacterial 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Urosepsis 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Wound infection 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Injury, poisoning and procedural complications
    Bone contusion 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Contusion 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Fall 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Femur fracture 0/21 (0%) 0/344 (0%) 3/344 (0.9%)
    Hip fracture 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Humerus fracture 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Infusion related reaction 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Lumbar vertebral fracture 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Multiple fractures 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Overdose 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Pseudomeningocele 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Radius fracture 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Skin laceration 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Spinal compression fracture 0/21 (0%) 1/344 (0.3%) 2/344 (0.6%)
    Synovial rupture 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Toxicity to various agents 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Traumatic arthritis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Upper limb fracture 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Investigations
    Alanine aminotransferase increased 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Aspartate aminotransferase increased 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    General physical condition abnormal 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Metabolism and nutrition disorders
    Decreased appetite 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Dehydration 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Diabetes mellitus 0/21 (0%) 0/344 (0%) 3/344 (0.9%)
    Diabetic ketoacidosis 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Hypercalcaemia 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Hyperglycaemia 0/21 (0%) 2/344 (0.6%) 1/344 (0.3%)
    Hyperkalaemia 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Hyponatraemia 0/21 (0%) 3/344 (0.9%) 2/344 (0.6%)
    Tumour lysis syndrome 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Type 1 diabetes mellitus 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Type 2 diabetes mellitus 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Musculoskeletal and connective tissue disorders
    Arthralgia 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Arthritis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Arthropathy 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Back pain 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Intervertebral disc degeneration 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Intervertebral disc protrusion 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Joint effusion 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Lumbar spinal stenosis 1/21 (4.8%) 0/344 (0%) 0/344 (0%)
    Myositis 0/21 (0%) 3/344 (0.9%) 0/344 (0%)
    Osteoarthritis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Pain in extremity 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Pathological fracture 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Polyarthritis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Psoriatic arthropathy 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Spinal pain 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Neoplasms benign, malignant and unspecified (incl cysts and polyps)
    Adenocarcinoma gastric 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Adenocarcinoma of colon 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Basal cell carcinoma 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Bladder adenocarcinoma stage unspecified 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Breast cancer 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Endometrial cancer 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Intraductal proliferative breast lesion 1/21 (4.8%) 0/344 (0%) 0/344 (0%)
    Malignant melanoma 0/21 (0%) 26/344 (7.6%) 27/344 (7.8%)
    Malignant neoplasm progression 1/21 (4.8%) 0/344 (0%) 1/344 (0.3%)
    Melanoma recurrent 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Metastases to bone 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Metastases to central nervous system 0/21 (0%) 1/344 (0.3%) 3/344 (0.9%)
    Metastases to lung 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Metastases to nervous system 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Metastatic malignant melanoma 0/21 (0%) 10/344 (2.9%) 7/344 (2%)
    Squamous cell carcinoma of skin 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Transitional cell carcinoma 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Tumour associated fever 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Tumour haemorrhage 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Nervous system disorders
    Altered state of consciousness 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Basal ganglia infarction 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Carotid artery stenosis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Central nervous system necrosis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Cerebral haemorrhage 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Dementia 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Dizziness 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Embolic stroke 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Epilepsy 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Facial paralysis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Headache 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Hemiparesis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Hydrocephalus 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Ischaemic cerebral infarction 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Ischaemic stroke 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Migraine 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Nervous system disorder 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Neurological symptom 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Paraesthesia 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Paraparesis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Paraplegia 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Seizure 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Speech disorder 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Spinal cord compression 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Syncope 0/21 (0%) 2/344 (0.6%) 1/344 (0.3%)
    Transient ischaemic attack 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Psychiatric disorders
    Completed suicide 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Confusional state 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Delirium 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Mental status changes 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Obsessive-compulsive disorder 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Somatic symptom disorder 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Renal and urinary disorders
    Acute kidney injury 0/21 (0%) 1/344 (0.3%) 2/344 (0.6%)
    Haematuria 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Nephrotic syndrome 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Renal colic 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Renal failure 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Renal impairment 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Ureteric obstruction 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Urinary retention 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Reproductive system and breast disorders
    Benign prostatic hyperplasia 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Gynaecomastia 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Respiratory, thoracic and mediastinal disorders
    Chronic obstructive pulmonary disease 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Dyspnoea 0/21 (0%) 3/344 (0.9%) 5/344 (1.5%)
    Immune-mediated pneumonitis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Interstitial lung disease 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Lung infiltration 1/21 (4.8%) 0/344 (0%) 0/344 (0%)
    Pleural effusion 0/21 (0%) 2/344 (0.6%) 1/344 (0.3%)
    Pneumonitis 1/21 (4.8%) 4/344 (1.2%) 5/344 (1.5%)
    Pneumothorax spontaneous 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Pulmonary embolism 0/21 (0%) 1/344 (0.3%) 2/344 (0.6%)
    Pulmonary oedema 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Pulmonary sarcoidosis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Respiratory failure 0/21 (0%) 2/344 (0.6%) 3/344 (0.9%)
    Sleep apnoea syndrome 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Skin and subcutaneous tissue disorders
    Dermatitis 0/21 (0%) 0/344 (0%) 2/344 (0.6%)
    Dermatitis bullous 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Drug eruption 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Eczema 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Rash 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Skin hypopigmentation 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Skin lesion 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Skin ulcer 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Stevens-Johnson syndrome 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Surgical and medical procedures
    Axillary lymphadenectomy 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Vascular disorders
    Arteritis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Deep vein thrombosis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Haemorrhage 0/21 (0%) 1/344 (0.3%) 1/344 (0.3%)
    Hypertensive crisis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Hypotension 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Labile blood pressure 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Peripheral artery occlusion 0/21 (0%) 2/344 (0.6%) 0/344 (0%)
    Subclavian vein thrombosis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Thrombophlebitis 0/21 (0%) 1/344 (0.3%) 0/344 (0%)
    Vena cava thrombosis 0/21 (0%) 0/344 (0%) 1/344 (0.3%)
    Other (Not Including Serious) Adverse Events
    Phase 1b: Talimogene Laherparepvec + Pembrolizumab Phase 3: Placebo + Pembrolizumab Phase 3: Talimogene Laherparepvec + Pembrolizumab
    Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events
    Total 21/21 (100%) 305/344 (88.7%) 317/344 (92.2%)
    Blood and lymphatic system disorders
    Anaemia 2/21 (9.5%) 26/344 (7.6%) 33/344 (9.6%)
    Leukopenia 2/21 (9.5%) 2/344 (0.6%) 0/344 (0%)
    Endocrine disorders
    Hyperthyroidism 3/21 (14.3%) 20/344 (5.8%) 22/344 (6.4%)
    Hypothyroidism 6/21 (28.6%) 49/344 (14.2%) 48/344 (14%)
    Eye disorders
    Visual impairment 2/21 (9.5%) 2/344 (0.6%) 6/344 (1.7%)
    Gastrointestinal disorders
    Abdominal pain 2/21 (9.5%) 24/344 (7%) 23/344 (6.7%)
    Abdominal pain upper 2/21 (9.5%) 12/344 (3.5%) 7/344 (2%)
    Constipation 4/21 (19%) 28/344 (8.1%) 52/344 (15.1%)
    Diarrhoea 13/21 (61.9%) 73/344 (21.2%) 70/344 (20.3%)
    Dry mouth 1/21 (4.8%) 19/344 (5.5%) 14/344 (4.1%)
    Frequent bowel movements 2/21 (9.5%) 1/344 (0.3%) 0/344 (0%)
    Nausea 7/21 (33.3%) 61/344 (17.7%) 92/344 (26.7%)
    Vomiting 7/21 (33.3%) 29/344 (8.4%) 56/344 (16.3%)
    General disorders
    Asthenia 2/21 (9.5%) 29/344 (8.4%) 27/344 (7.8%)
    Chills 8/21 (38.1%) 17/344 (4.9%) 73/344 (21.2%)
    Face oedema 2/21 (9.5%) 0/344 (0%) 3/344 (0.9%)
    Fatigue 15/21 (71.4%) 94/344 (27.3%) 137/344 (39.8%)
    Influenza like illness 5/21 (23.8%) 26/344 (7.6%) 64/344 (18.6%)
    Injection site pain 2/21 (9.5%) 14/344 (4.1%) 15/344 (4.4%)
    Injection site reaction 2/21 (9.5%) 3/344 (0.9%) 10/344 (2.9%)
    Oedema peripheral 5/21 (23.8%) 22/344 (6.4%) 27/344 (7.8%)
    Pain 1/21 (4.8%) 18/344 (5.2%) 24/344 (7%)
    Pyrexia 10/21 (47.6%) 33/344 (9.6%) 128/344 (37.2%)
    Infections and infestations
    Cellulitis 2/21 (9.5%) 9/344 (2.6%) 14/344 (4.1%)
    Influenza 2/21 (9.5%) 7/344 (2%) 9/344 (2.6%)
    Nasopharyngitis 1/21 (4.8%) 23/344 (6.7%) 21/344 (6.1%)
    Oral herpes 2/21 (9.5%) 16/344 (4.7%) 15/344 (4.4%)
    Rhinitis 2/21 (9.5%) 11/344 (3.2%) 7/344 (2%)
    Upper respiratory tract infection 2/21 (9.5%) 17/344 (4.9%) 17/344 (4.9%)
    Urinary tract infection 1/21 (4.8%) 17/344 (4.9%) 22/344 (6.4%)
    Injury, poisoning and procedural complications
    Contusion 2/21 (9.5%) 3/344 (0.9%) 4/344 (1.2%)
    Infusion related reaction 2/21 (9.5%) 0/344 (0%) 4/344 (1.2%)
    Procedural pain 2/21 (9.5%) 5/344 (1.5%) 9/344 (2.6%)
    Investigations
    Alanine aminotransferase increased 3/21 (14.3%) 23/344 (6.7%) 26/344 (7.6%)
    Aspartate aminotransferase increased 3/21 (14.3%) 16/344 (4.7%) 20/344 (5.8%)
    Blood alkaline phosphatase increased 2/21 (9.5%) 7/344 (2%) 15/344 (4.4%)
    Blood iron decreased 2/21 (9.5%) 1/344 (0.3%) 0/344 (0%)
    Metabolism and nutrition disorders
    Decreased appetite 0/21 (0%) 26/344 (7.6%) 43/344 (12.5%)
    Hyperglycaemia 3/21 (14.3%) 11/344 (3.2%) 19/344 (5.5%)
    Hyperkalaemia 2/21 (9.5%) 5/344 (1.5%) 2/344 (0.6%)
    Hypophosphataemia 2/21 (9.5%) 3/344 (0.9%) 14/344 (4.1%)
    Musculoskeletal and connective tissue disorders
    Arthralgia 8/21 (38.1%) 66/344 (19.2%) 82/344 (23.8%)
    Back pain 3/21 (14.3%) 30/344 (8.7%) 35/344 (10.2%)
    Muscle spasms 2/21 (9.5%) 5/344 (1.5%) 9/344 (2.6%)
    Myalgia 2/21 (9.5%) 16/344 (4.7%) 33/344 (9.6%)
    Pain in extremity 4/21 (19%) 21/344 (6.1%) 29/344 (8.4%)
    Neoplasms benign, malignant and unspecified (incl cysts and polyps)
    Squamous cell carcinoma 3/21 (14.3%) 1/344 (0.3%) 1/344 (0.3%)
    Nervous system disorders
    Headache 9/21 (42.9%) 44/344 (12.8%) 62/344 (18%)
    Neuropathy peripheral 2/21 (9.5%) 0/344 (0%) 4/344 (1.2%)
    Paraesthesia 2/21 (9.5%) 6/344 (1.7%) 13/344 (3.8%)
    Psychiatric disorders
    Anxiety 2/21 (9.5%) 7/344 (2%) 11/344 (3.2%)
    Insomnia 3/21 (14.3%) 27/344 (7.8%) 23/344 (6.7%)
    Respiratory, thoracic and mediastinal disorders
    Cough 8/21 (38.1%) 44/344 (12.8%) 58/344 (16.9%)
    Dyspnoea 4/21 (19%) 24/344 (7%) 23/344 (6.7%)
    Pneumonitis 2/21 (9.5%) 7/344 (2%) 18/344 (5.2%)
    Skin and subcutaneous tissue disorders
    Actinic keratosis 2/21 (9.5%) 4/344 (1.2%) 6/344 (1.7%)
    Alopecia 3/21 (14.3%) 3/344 (0.9%) 10/344 (2.9%)
    Erythema 2/21 (9.5%) 15/344 (4.4%) 15/344 (4.4%)
    Pruritus 7/21 (33.3%) 55/344 (16%) 61/344 (17.7%)
    Rash 9/21 (42.9%) 42/344 (12.2%) 61/344 (17.7%)
    Rash erythematous 2/21 (9.5%) 1/344 (0.3%) 4/344 (1.2%)
    Rash macular 2/21 (9.5%) 1/344 (0.3%) 6/344 (1.7%)
    Rash maculo-papular 3/21 (14.3%) 17/344 (4.9%) 20/344 (5.8%)
    Skin lesion 2/21 (9.5%) 2/344 (0.6%) 11/344 (3.2%)
    Skin mass 2/21 (9.5%) 2/344 (0.6%) 0/344 (0%)
    Urticaria 2/21 (9.5%) 2/344 (0.6%) 3/344 (0.9%)
    Vitiligo 5/21 (23.8%) 32/344 (9.3%) 44/344 (12.8%)
    Vascular disorders
    Hypertension 1/21 (4.8%) 22/344 (6.4%) 19/344 (5.5%)

    Limitations/Caveats

    [Not Specified]

    More Information

    Certain Agreements

    Principal Investigators are NOT employed by the organization sponsoring the study.

    The Clinical Trial Agreement generally does not restrict an investigator's discussion of trial results after completion. The Agreement permits Amgen a limited period of time to review material discussing trial results (typically up to 45 days and possible extension). Amgen may remove confidential information, but authors have final control and approval of publication content. For multicenter studies, the investigator agrees not to publish any results before the first multi-center publication.

    Results Point of Contact

    Name/Title Study Director
    Organization Amgen Inc.
    Phone 866-572-6436
    Email medinfo@amgen.com
    Responsible Party:
    Amgen
    ClinicalTrials.gov Identifier:
    NCT02263508
    Other Study ID Numbers:
    • 20110265
    • 2014-000185-22
    • KEYNOTE-034
    First Posted:
    Oct 13, 2014
    Last Update Posted:
    May 16, 2022
    Last Verified:
    Apr 1, 2022