One in eight (12 percent) of U.S. women aged 90 years or younger will develop breast cancer sometime during her lifetime.
One in 70 (1.4 percent) will develop ovarian cancer.
Being female, increasing age, and family history of breast and/or ovarian cancer are the three greatest risk factors for both breast cancers and ovarian cancer.
The majority of breast and ovarian cancers are not caused by an inherited genetic factor. However, 5 percent to 10 percent of all breast cancer is caused by a genetic change inherited from a parent. Patients with hereditary cancer face additional cancer risks themselves as do their family members. Identifying those at risk and providing access for a cancer risk assessment are important in providing the best care for all members of these families.