胃癌是全球最常见的恶性肿瘤之一,在亚洲和中国发病率较高,在发达国家发病率虽有下降,但死亡率下降并不显著,居恶性肿瘤死因的第二位。在中国胃癌发病率位居第三,死亡率位居第四川~([1])。死亡率居高不降的主要原因包括:早诊率低(Ⅰ期仅占10%),根治性手术切除率低(仅占手术患者的50%~65%)。胃癌总体5年生存率约30%。外科手术切缘阴性(RO切除)和足够的淋巴结清扫(D2淋巴结清扫术)是胃癌根治性治疗的惟一手段,但多数患者就诊时病期较 Gastric cancer is one of the most common malignancies in the world, with a high incidence in Asia and China. Although the incidence in developed countries has declined, the mortality rate has not decreased significantly, ranking second in the cause of death from malignant tumors. The incidence of gastric cancer ranks third in China, and the mortality rate ranks first in Sichuan ([1]). The main reasons for the high mortality rate include: low rate of early diagnosis (only 10% of stage I), and low rate of radical surgical resection (only 50% to 65% of patients undergoing surgery). The overall 5-year survival rate of gastric cancer is about 30%. Surgical margins (RO resection) and adequate lymph node dissection (D2 lymph node dissection) are the only means of radical gastrectomy for gastric cancer, but the majority of patients have a longer period of illness at the time of treatment.