What is hereditary breast cancer?
Cancer is unfortunately very common, with 1 in 2 people developing cancer at some point in their lifetime. Breast cancer occurs in 1 in 8 women; with 80% being diagnosed after age 50; while ovarian cancer occurs in about 1 in 75 women.. Men can also develop breast cancer although this is rarer, accounting for only 1% of all breast cancer. Most breast cancer occurs by chance however about 5-10% is inherited. When breast cancer is inherited it may be caused by a mutation (fault) in one of the breast/ovarian cancer genes, known as BRCA 1&BRCA2, or in a different breast cancer associated gene.