Abstract
A case of early breast cancer developed in a 68-year-old man after operation for a gastric cancer was experienced. There was a history of gastrectomy for a cancer of the pyloric antrum in 1982. Histologically it was moderately differentiated adenocarcinoma with the invasion depth of ss, INFβ, lyo, vo, n(-) and in stage I. In March, 1991, he noticed a 1 cm tumor with tenderness in the CE region of the right breast, and was seen at the hospital. Ultrasonography and needle aspiration cytology indicated a breast cancer. Mastectomy with preservation of greater pectoral muscle was carried out. Histologically it was a hard carcinoma, t1, n0, m0, and in stage I, associating with gynecomastia. Hormone receptor assay resulted in positive for both ER and PgR. Male breast cancer rarely occurs in a frequency of around 1% of all breast cancers, and an average age of the onset is higher than that in females. Male breast cancer has been believed to have poor prognosis compared to the other, however, it is recently reported by similar. This case associating with gastric carcinoma is the 10th in Japan. Both carcinomas in this case were in stage I, and good prognosis can be expected. Further efforts to enlighten the male breast cancer are essential for its early detection.
