The Risk of Cancer Associated with Specific Mutations of<i>BRCA1</i>and<i>BRCA2</i>among Ashkenazi Jews

Over 2 percent of Ashkenazi Jews carry mutations in BRCA1 or BRCA2 that confer increased risks of breast, ovarian, and prostate cancer. The risks of breast cancer may be overestimated, but they fall well below previous estimates based on subjects from high-risk families.