Genetic Predisposition to Breast and Ovarian Cancer: Prospective Study of BRCAx Gene Mutation

This trial is following people who carry a harmful mutation in the BRCA1 or BRCA2 genes — which significantly raise the risk of breast and ovarian cancer — to study how the cancer develops over time and how different prevention or treatment choices affect long-term outcomes. **You may be eligible if...** - You are a woman or man (18 years or older) who carries a confirmed harmful BRCA1 or BRCA2 mutation - You may or may not currently have cancer - You are enrolled in the French health insurance system or are a beneficiary - You have signed a consent form to participate **You may NOT be eligible if...** - You are a minor (under 18) or under legal protection - You are unable to give informed consent - You do not have a confirmed BRCA1 or BRCA2 mutation Talk to your doctor to see if this trial is right for you.