人们已认识到,在癌肿出现之前往往有一个多年持续的癌前病变阶段。目前大都认为不典型增生为真正的癌前病变,对于那些粘膜虽然有病变,但不典型增生属阴性或可能阴性的患者,虽然从群体和流行病学角度来看已属于癌度危险性增高的癌前期状态(如慢性萎缩性胃炎、胃溃疡、胃息肉、残胃等),但就患者个体而言,目前尚不处于胃癌危险性增高的情况,故无需特殊处理。胃粘膜上皮的不典型增生,近年来虽有不少研究,但分型分级比较混乱,往往不同病理医生的诊断和分级之间存在 It has been recognized that there is often a stage of precancerous lesions that persist for many years before the onset of cancer. At present, most people think that atypical hyperplasia is a true precancerous lesion. Although those with mucosal lesions, but patients with negative or possibly negative dysplasia, although from the perspective of population and epidemiological point of view have increased the risk of cancer Precancerous conditions (such as chronic atrophic gastritis, gastric ulcers, gastric polyps, residual stomach, etc.), but in terms of individual patients, is not yet in the case of increased risk of gastric cancer, so no special treatment. The dysplasia of gastric mucosal epithelium has been studied in recent years, but the classification and grading are relatively confusing and often exist between the diagnosis and grading of different pathologists.