Hereditary breast cancer accounts for about 5-10 % of all breast cancerts. It is a type of breast cancer that is caused by inherited genetic mutations that increase the risk of developing breast cancer. These genetic mutations are usually passed down from parents ( from maternal or paternal side ) to their children. The most common genes associated with hereditary breast cancer are BRCA1 and BRCA2, but other genes may also be involved. Women who have inherited these genetic mutations have a much higher risk of developing breast cancer compared to the general population.

They may also have an increased risk of developing other types of cancer, such as ovarian cancer. Screening and early detection are important for women with a family history of breast cancer or those who have tested positive for genetic mutations associated with hereditary breast cancer.