BRIEF COMMUNICATION RIEF COMMUNICATION Male Breast Cancer Incidence Among Atomic Bomb Survivors

To learn more about the role of ioniz-ing radiation in the development of male breast cancer, we evaluated male breast cancer incidence among 45 880 male members of the Life Span Study cohort of Japanese atomic bomb sur-vivors. Male breast cancers, diagnosed between January 1, 1958, and Decem-ber 31, 1998, were identifi ed throug