Breast cancer is uncommon in males. The risk of development of breast cancer is increased in females compared to males at a ratio of 100:1. Men who are carriers of BRCA2 mutation have higher risk of development of breast cancer. A male carrying BRCA2 mutation has about 6 percent chance of developing breast cancer during his lifetime.
White women have increased risk of
development of breast cancer compared to other ethnic populations in the United States. Until the age of menopause the difference between risks among Caucasian women and African American women may not be appreciable. After menopause the difference becomes marked. The breast cancer incidence in Caucasian women is about twice compared to American Asian, or Hispanic women. Breast cancer risk is very low in Native Americans.