Abstract
Male Breast Cancer is a comparatively rare disease, and it accounts for about 1.0 % of all breast cancers. We report a 75-year-old man with breast cancer. He had noticed a breast mass just under the right nipple in September 1999. Because the mass had gradually enlarged, he came to our hospital on November 5th. The tumor was 3.0cm in diameter. Skin biopsy from the mammary areola showed carcinoma. Since there were no findings of malignancy in the rest of his body by examination and the mass appeared just under the male nipple, we diagnosed this case as Male Breast Cancer. Auchincloss' operation and lymphadenectomy were performed by surgeons. From histological findings this case was confirmed to be medullary carcinoma. [Skin Cancer (Japan) 2000; 15: 305-308]
