Most Breast Cancer

Above: the reason that the general population doesn't know about the BRCA gene mutation (even though they know people with breast cancer). Most breast cancer is sporadic (random). Only 35% has some sort of genetic link. And beyond that, only 10% of women with breast cancer have a BRCA mutation. So, one way of saying it is: Most women who will get breast cancer DON'T have the BRCA mutation, but most women with the BRCA mutation will get breast cancer.