BRCA1 (breast cancer 1) and BRCA2 (breast cancer 2) are tumor-suppressing genes. In healthy, normal cells, BRCA1 and BRCA2 help protect you from getting certain cancers. However, mutations in the BRCA1 and BRCA2 genes interfere with them working properly, elevating an individual’s risk for breast cancer and more.
Inherited mutations of BRCA1 and BRCA2 account for roughly 3% of breast cancers (about 7,500 women per year). However, having a BRCA1 or BRCA2 mutation does not automatically mean you will get breast cancer.