Abstract
Among 8 cases of malignant lymphoma of the stomach observed in this department during these 5 years, 2 cases coexisted with gastric carcinoma. This sort of concomitance in the same stomach has been reported only in 19 cases, including above two, in Japan. Numbers and histological types of the malignant lymphoma reported were 16 cases of reticulosarcoma, 2 cases of Hodgkin's disease and a case of unknown histological type. Histology of all the gastric carcinomas was adenocarcinoma. Among them, 10 cases were advanced cancer and 9 cases were early cancer; these were 4 cases of IIc type, 2 cases of IIb type, a case of I type, a case of IIa+IIc type and an unclassified case. It is noteworthy that early cancers were relatively common in the combined cases. Eleven cases (58%) of malignant lymphoma and 12 cases (63%) of carcinoma were found in the lower third (A) and 2 cases (11%) of the lymphoma and 3 cases (16%) of carcinoma were observed in the middle third (M) of the stomach. Among the lymphomas, 13 cases were ulcerating type, 5 cases were tumor-forming type and one case was diffusely-infiltrating type. Most of the gastric cancers, both early and advanced ones, were ulcerating type. The lesions of malignant lymphoma and cancer were located independently in 10 cases and in collision in 9 cases. There was no carcinosarcoma. The age and sex of these cases were distributed mostly in 50 to 60 year-old males.
