EXOME Analysis Position in the Strategy of Genetic Predisposition Factors Identification in Early-onset Cancer (EX²TRICAN)

Centre Georges Francois Leclerc

Status: Enrolling

Conditions: Genetic Predisposition; Cancer

Treatments: Genetic: blood sample

Study type: Interventional

Funder types: Other

Identifiers

NCT04141462

EX²TRICAN

Details and patient eligibility

About

5 to 10% of cancers are due to the presence of a constitutional genetic alteration. It can be inherited from parents (family form) or by accident, in the first moments of life after fertilization (sporadic form). In both cases, this genetic alteration is constitutional and transmissible to descendants. It is hereditary. When an hereditary early form is suspected, several well-known genes generally involved in genetic predispositions to cancer are found by a technique called " gene panel ". However, this analysis does not always identify the genetic predisposing factors for cancer. New techniques called "high-throughput exome sequencing (SHD-E)", allow more than the analysis of the the gene panel. These analysis allow to identify alterations in other genes that could contribute to the development of cancer. The objective of the Ex²trican study is to show, from patients with early cancer (sporadic or familial form), that this approach to exome sequencing can be effective to identify new genetic risk of cancer, when the first panel analysis of genes is negative.

Full description

The main objective of this study is to evaluate the interest of the SHD-E approaches after a negative result of the analysis called " gene panel " tested in routine in order to identify a genetic factor of predisposition to the cancer.

Enrollment: 613 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

Index case:

1. Major or minor patient
2. Histological or cytological evidence of malignant tumor diagnosis
3. Patient with cancer before age 40 (or before age 30 for breast cancer).
4. Absence of anomaly found on the oncogenetic panel tested in the predisposition concerned
5. Patient affiliated to a social security scheme
6. Signature of Informed Consent EXTRICAN
7. Availability of a tumor sample if needed secondary functional studies
8. Availability of both parents when the trio approach will be necessary in the population 1 (or validation of the indication in CPR in case of non-availability of both parents)
9. Availability of affected relatives in population 2 (or validation of the indication in SPC in case of non-availability of the related person)

Related:

1. Major or minor patient
2. Histological or cytological evidence of the diagnosis of malignant tumor if
3. Patient affiliated to a social security scheme
4. Signing informed consent EXTRICAN

Exclusion criteria

Index and related case:

1. Refusal of the patient participation
2. Psychiatric illness and / or condition of the patient compromising the understanding of the information or the realization of the study
3. Patient under guardianship, curatorship or safeguard of justice
4. Pregnant woman

Trial design

Primary purpose: Diagnostic

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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613 participants in 1 patient group

Patients with a a constitutional genetic alteration

Experimental group

Description:

one genetic consultation and one blood test

Treatment:

Genetic: blood sample