HBOC Cancer Risks
BRCA mutations dramatically increase the risk of developing cancer, and are responsible for the majority of hereditary breast and ovarian cancer. 66,67 Patients with a mutation in either the BRCA1 or BRCA2 gene have risks of up to 87% for breast cancer and up to 44% for ovarian cancer by age 70.3-5,68 Mutation carriers previously diagnosed with cancer also have a significantly increased risk of developing a second cancer.16 Fortunately, genetic testing is available to identify patients who have germline mutations in BRCA1 and BRCA2 genes, and help them develop strategies to begin reducing their cancer risks.
BRCA Mutation Dramatically Increases the Risk of Cancer 
