Breast cancer in men.

O ne of the rarest cancers in men, breast cancer occurs approximately 100 times less than in women. The lifetime risk of having breast cancer is 1 in 1,000 for men, and incidence has remained relatively stable over the past 30 years. Whereas in the past, the prognosis for men with breast cancer was thought to be worse than for women, recent research has found little difference in outcomes. But awareness, research, and treatments pose challenges for these patients. Because of disease rarity and recruitment diffi culties, studies tend to be small, and recent research shows that breast cancer in men may require sex-specifi c drug regimens.