Clinical Research Directory

Inclusion Criteria: * Female participant * Participant undergoing oncogenetic follow-up at the Centre François Baclesse * Participant belonging to a pair of related biological siblings * Within the sibling pair, one participant is a carrier of a hereditary predisposition linked to a BRCA1/2 mutation (case), and the other participant is not a carrier (control). * Participant between 30 and 50 years of age * Participant affiliated to a social security scheme * Participant having given her consent to participate by signing an informed consent form prior to any specific study-related procedure. Exclusion Criteria: \-