Breast Cancer Genes: BRCA1 and BRCA2
This inherited form of breast cancer is due to mutations in either the BRCA1 (breast cancer 1) or BRCA2 (breast cancer 2) genes. These genes are involved with repair of damaged DNA, but when the gene is mutated, DNA damage goes unrepaired and can lead to an increase risk of developing breast cancer and ovarian cancer.
Hereditary breast cancer accounts for 5 to 10 percent of diagnosed breast cancer cases. It can be passed down from the paternal or maternal side of the family and those who inherit this breast cancer gene mutation are 50% to 85% more likely to develop breast cancer.




