PREDICYTHY: Predictive Value of 10 microRNA in Thyroid Cytologies of Undetermined Type
Study Details
Study Description
Brief Summary
The aim is to validate a signature of 10 microRNA (micro Ribonucleic acid) selected in a first exploratory study allowing the stratification of the cytologies of indeterminate type (In a first step, the teams will focus on standardising the pre-analytical stages and defining a threshold of positivity. The results of microRNA signature on a cohort of 70 patients will be compared with the ultrasound and then histological data of the resection specimen.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
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N/A |
Detailed Description
Morphological analysis of fine-needle aspiration cytology (FNAC) under ultrasound classifies thyroid nodules in 6 categories (Bethesda classification). The diagnostic approach is codified by the Society of Endocrinology and for cytologies of indeterminate type (Bethesda 3, 4 and 5), surgery of thyroid nodules is currently recommended. However, only 15.9% of the cytologies classified Bethesda 3, 26.1% of the Bethesda IV and 75.2% of the Bethesda V are actually cancers in the definitive histological analysis on surgical resection.
Thus, new tools for predicting the risk of thyroid nodule malignancy need to be developed.
To date, various risk stratification biomarkers have been reported in the literature but have not been validated in independent cohorts, thus excluding their implementation in daily practice.
In addition, two commercial nucleic acid tests are proposed at a cost not compatible with generalized diffusion. The first approach is based on a next generation sequencing analysis of a target gene panel at the nucleotide sequence or transcribed level. The second alternative combines an analysis at level 1) of the deoxyribonucleic acid (DNA) with the search for somatic variations such as mutations in oncogenes or the presence of fusion genes, and 2) microRNA with the measurement of their level of expression.
Due to their stability, their ability to modulate the expression of various messenger RNA, microRNA are an attractive line of research.
The aim is to validate a signature of 10 microRNA selected in a first exploratory study allowing the stratification of the cytologies of indeterminate type (In a first step, the teams will focus on standardising the pre-analytical stages and defining a threshold of positivity. The results of microRNA signature on a cohort of 70 patients will be compared with the ultrasound and then histological data of the resection specimen.
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Experimental: Signature of 10 microRNA Signature of 10 miRNA in patients with Thyroid Cytologies of undetermined type and with a Bethesda classification 3, 4 or 5 |
Diagnostic Test: Signature of 10 microRNA for patients with bethesda classification 3, 4 or 5
If the cytology results are Bethesda 3, 4 or 5, then a miRNA analysis will be performed.
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Outcome Measures
Primary Outcome Measures
- Area under receiver operating characteristic (ROC) curve of the 10 microRNA signature [24 months]
Secondary Outcome Measures
- Sensitivity of the test (10 microRNA) [24 months]
Sensitivity is defined as the proportion of patients with a malignant nodule (diagnosed by the gold standard method) and a positive test with miRNA signature.
- Specificity of the test (10 microRNA) [24 months]
The specificity of the test is defined as the proportion of patients with a benign nodule (diagnosed by the gold standard method) and a negative test with miRNA signature.
- Positive predictive value (PPV) of the test (10 microRNA) [24 months]
The positive predictive value is defined as the probability that the patient with a positive test is actually affected by a malignant nodule (diagnosed by the gold standard method).
- Negative predictive value (NPV) of the test (10 microRNA) [24 months]
The negative predictive value is defined as the probability that the patient with a negative test is actually affected by a benign nodule (diagnosed by the gold standard method).
Eligibility Criteria
Criteria
Inclusion Criteria:
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Man or woman whose Age is ≥ 18 years
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Patient requiring ultrasound for thyroid nodule scanning with established indication of FNAC
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Patient with Bethesda 3, 4 and 5 thyroid nodule
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Informed patient and signed informed consent received
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Patient affiliated to a French medical coverage system
Exclusion Criteria:
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Patient under guardianship, curatorship or safeguarding of justice
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Patient whose medical or psychological conditions do not permit them to complete the study or to sign the consent,
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Patient with metastatic cancer distinct from thyroid cancer
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Patient who has stopped treatment (chemotherapy / immunotherapy) for cancer for less than 6 months.
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | CHU de Toulouse | Toulouse | Haute-Garonne | France | 31000 |
| 2 | Institut régional du Cancer de Montpellier | Montpellier | Hérault | France | 34298 |
Sponsors and Collaborators
- Institut du Cancer de Montpellier - Val d'Aurelle
Investigators
- Study Chair: Christine Rivière, MD, Institut régional du Cancer de Montpellier
Study Documents (Full-Text)
None provided.More Information
Publications
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