Objective To study the relationship between gastric cancer and the atypical hyperplasia,intestinal metaplasia and atypical cystic dilatation of gastric mucous membranes.

• 目的研究胃黏膜(中、重度)异型增生、肠上皮化生及异型性囊性扩张三种癌前病变与胃癌发生的关系。