胃癌是最为常见的恶性肿瘤之一,早期胃癌多无症状,或者仅有一些非特异性消化道症状,易被患者忽视,就诊时往往已是中晚期,然而早期诊断是治疗胃癌的前提。上皮间质转化(epithelial-mesenchy- Gastric cancer is one of the most common malignant tumors. Early gastric cancer is asymptomatic, or only some nonspecific gastrointestinal symptoms are easily overlooked by patients. The diagnosis is often in the advanced stage. However, early diagnosis is the prerequisite for the treatment of gastric cancer. Epithelial-mesenchymal transformation (epithelial-mesenchy-