Abstract
We present the case of a 80-year-old male, who fad surgery for rectal cancer in 1994. Histological examination revealed well differentiated adenocarcinoma of a1, ly1, n0, ow(-), aw(-). In January, 1998, he noticed a tumor in the left breast, and was seen at the hospital. Ultrasonography and incisional biopsy indicated a breast cancer. Mastectomy with preservation of the pectoral muscle was carried out. Histologically it was hard carcinoma, T3, N1 α, M0, and in stage III. There has been no recurrence or metastasis after the operation. Male breast cancer rarely occurs, with a frequency of about 1% of all breast cancers. Male breast cancer has been believed to have a poor prognosis compared to other breast cancers. However, recently similar case have been reported. This rare case is the 6th occurrence double cancer involving male breast and colon, and the 2 nd occurrence involving male breast and rectum in the Japanese literature.
