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早期胃癌（ＥＧＣ）是指侵犯限于黏膜或黏膜下的胃癌，文献报道其５年生存率超过９０％。ＥＧＣ可分为黏膜癌和黏膜下癌（ＳＭＧＣ），淋巴结转移在黏膜癌少见，但黏膜下癌转移率约为１５－２％～２３－８％，有报道黏膜下癌直径大于４ｃｍ或为弥漫型并有血管侵犯时，淋巴结转?
Early-stage gastric cancer (EGC) refers to invasion of gastric cancer limited to mucosa or submucosa. The literature reports that its 5-year survival rate exceeds 90%. EGC can be divided into mucosal and submucosal cancer (SMGC). Lymph node metastasis is rare in mucosal cancer, but the metastatic rate of submucosal cancer is about 15-2% to 23-8%. Reported that submucosal cancer is more than 4cm in diameter or diffuse. Type with vascular invasion, the lymph nodes turn?