早期胃癌(early gastric cancer,EGC)首先由日本学者提出并得到公认,主要根据病变浸润深度,即病变位于黏膜及黏膜下层,无论有无淋巴结转移,均称EGC。EGC又分为黏膜癌(mucosal cancer)及黏膜下癌(submucosal cancer)。近年来随着胃癌诊断手段的不断进步,对其生物学特性与治疗也有了更深的了解,使治疗策略有了新认识。 Early gastric cancer (EGC) was first proposed by Japanese scholars and recognized, mainly based on the depth of invasion of the lesion, that lesions located in the mucosa and submucosa, with or without lymph node metastasis, are called EGC. EGC is divided into mucosal cancer and submucosal cancer. In recent years, with the continuous progress of gastric cancer diagnosis, its biological characteristics and treatment also have a deeper understanding of the treatment strategy has a new understanding.