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胃癌是我国最常见的恶性肿瘤之一,占全部恶性肿瘤死亡人数约四分之一左右,严重危害人民的健康。1962年日本内镜学会制订了胃癌的分期,特别是早期胃癌的定义和内镜下的分类,经过长期实践,现已为各国学者所采用。胃癌起源于胃粘膜,癌细胞可向胃腔或浆膜方向生长,也可在胃壁内向纵的方向浸润扩散。早期胃癌是指癌细胞仅侵及粘膜和粘膜下层的胃癌,而不论其范围大小和有无淋巴结转移。早期胃癌手术后5年生存率可达90%以上,预后好;小于5mm的微小胃
Gastric cancer is one of the most common malignancies in China, accounting for about one-fourth of all cancer deaths, and seriously endangering people’s health. In 1962, the Japanese Endoscopic Society established the staging of gastric cancer, especially the definition of early gastric cancer and the classification under endoscopy. After long-term practice, it has been adopted by scholars from various countries. Gastric cancer originates from the gastric mucosa. Cancer cells can grow in the direction of the stomach cavity or serous membrane, and can also infiltrate and diffuse in the longitudinal direction of the stomach wall. Early gastric cancer refers to cancer cells that invade the mucosa and submucosa, regardless of their size and lymph node metastasis. The 5-year survival rate of early gastric cancer can reach 90% and the prognosis is good; the tiny stomach less than 5mm