Pathological study of multiple gastric carcinoma.

Multiple gastric carcinoma was investigated on 101 of 1901 resected stomachs. The frequency of multiple carcinoma was 4.7% and 6.9% of the advanced and early carcinomas, respectively. Male to female ratio was 2.9 to 1 with average age of 62.0 and that was 1.9 to 1 with average age of 57.7 in the total gastric carcinomas. The well-differentiated carcinomas with intimate relation to the intestinal metaplasia increased by aging and occupied about 70% of all lesions. The intestinal metaplasia usually showed higher grade in the cases with multiple carcinomas than those with single lesion. It should be considered that intestinal metaplasia plays the important role in the histogenesis of gastric carcinoma, especially in that of the well-differentiated one.