There were 2385 (1236 female, 1149 male) cases of malignant lymphoma diagnosed in Kaunas region. Forty-five cases of histologically confirmed malignant gastric lymphoma diagnosed throughout 1981-2000 period are discussed. The disease was diagnosed to 37 patients only after surgery and to other eight by means of endoscopical investigation. Before establishing the correct diagnosis, gastric carcinoma was supposed to 27 patients, gastric ulcer to 12 patients, gastropathia erosiva to 6 patients. Histologically primary non-Hodgkin gastric lymphoma was diagnosed to 29 patients. That consisted 78.3 per cent of all surgically treated patients, 64.4 per cent of histologically confirmed cases and 1.2 per cent of all diagnosed malignant lymphomas. Gastric lymphogranulomatosis was diagnosed to 16 patients. Primary lymphogranulomatosis three cases. After supposed stomach cancer, three patients were operated. All patients were examined by X-ray, CT and endoscopy. Biopsy was taken from pathological or not pathological mucous membrane.