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[Genetic predisposition and ovarian cancer]
Isabelle Coupier1, Marion Gauthier-Villars, Pascale This
1Service de génétique oncologique, Institut Curie, 75248 Paris 5. isabelle.coupier@curie.net
La Revue Du Praticien
|January 6, 2005
Summary
Genetic predisposition to ovarian cancer includes two forms: BRCA1/BRCA2 mutations linked to breast and ovarian cancer, and Lynch syndrome (hereditary non-polyposis colorectal cancer) genes. Management varies from monitoring to prophylactic surgery.
Area of Science:
- Oncology
- Genetics
- Gynecologic Oncology
Context:
- Epithelial ovarian cancer has distinct genetic predispositions.
- Familial cancer syndromes significantly increase ovarian cancer risk.
- Understanding genetic links is crucial for risk assessment and management.
Purpose:
- To differentiate the genetic forms of ovarian cancer predisposition.
- To identify key genes associated with familial ovarian cancer.
- To outline clinical management strategies for at-risk individuals.
Summary:
- Two main genetic predispositions exist for ovarian cancer: familial breast and/or ovarian cancer (linked to BRCA1/BRCA2 mutations, explaining 5.5% of cases) and hereditary non-polyposis colorectal cancer (HNPCC) syndrome (linked to hMLH1, hMSH2, hMSH6 genes, explaining 1-2% of cases).
- BRCA1 and BRCA2 mutations are implicated in familial breast and ovarian cancer.
- Mutations in hMLH1, hMSH2, and hMSH6 genes are associated with HNPCC syndrome.
Impact:
- Clinical management for women at risk of ovarian cancer is diverse.
- Management strategies range from regular screenings to prophylactic oophorectomy, especially with BRCA mutations.
- This genetic understanding allows for personalized risk management and preventative strategies.