Eight cases of gastric remnant carcinoma are reported and its possible etiology, course of disease, prevention and treatmant are discussed together with literature review. Duodenal ulcer, except with serious complications, should be treated conservatively. For benign gastric ulcer gastrectomy may be considered in individual case, but the operative indication can be controlled by its lesions. Regular follow-up study should be performed on patients who had gastrectomy for more than five years.