抄録
A 61-year-old man came to the hospital with the chief complaint of an inflation-like discomfort in the epigastrium and a mass in the left breast. An operation on the patient with gastrectomy and simple mastectomy resulted in a histological finding of double primary carcinomas.
The tumor of the left breast was a cylindrical epithelial cancer while one of the greater curvature of pylorus was a combination of mucous and cuboid epithelial cancers.
The year 1957 found reports of double primary carcinomas in Japan affecting 55 patients including the one recorded here. Fifty three per cent of the known patients had the disease accompanying gastric cancer. But a combination of gastric cancer with that of the breast was present only in three instances. Except for the individual recorded here, there have been no male patients in whom cancers developed concurrently in the stomach and the breast. Of these patients none had gastric cancer.
In 1957 reports of male patients with carcinoma of the breast in Japan with the addition of the one recorded here totaled 66. It is difficult to draw a conclusion as to whether trauma or hormonal imbalance accounts for the incidence of carcinoma of the breast in man. Neverthless, there is good evidence to show that the latter plays a larger part in etiology than would otherwise be thought. Trauma and chronic irritation are considered to combine with this, doing much as an indirect cancer-inducing factor. Male patients represent 1-1.5% of the total cases with carcinoma of the breast and the rate, both Japanese and foreign, is practically equal. However, particular attention should be given to the breast cancer in man as it becomes metastic at an earlier time than at which this occurs in womn.
