Male mammography.

Over a 7-year period, 94 mammograms were performed for male breast disease. Indications included breast enlargement, tenderness, mass, and previous mastectomy. Fatty enlargement was easily diagnosed. Gynecomastia was unilateral in 28 of 40 cases and easily differentiated from malignancy in all but one patient in whom nipple retraction was present. In cases of bilateral gynecomastia, eight showed asymmetric involvement. Three carcinomas were studied, two of which were clinically obvious. One asymptomatic cancer was detected on routine follow-up in a man with previous mastectomy.