胃癌是世界范围内最常见的恶性肿瘤之一,全球每年新发胃癌约95万例,死亡72万例~([1])。我国胃癌的发病率、病死率位居消化道肿瘤首位,复发是导致胃癌术后患者不良预后的主要原因。据统计,我国胃癌根治术后复发率约40.0%~60.0%,进展期患者达50.0%~70.0%,复发转移后患者中位生存期仅3~24个月~([2])。复发患者的随访观察、早期诊断以及复发 Gastric cancer is one of the most common malignancies in the world. There are about 950,000 new cases of gastric cancer worldwide each year, with 72 million deaths ([1]). The incidence of gastric cancer in China, the highest mortality in gastrointestinal tumors, recurrence is the leading cause of poor prognosis of patients with gastric cancer after surgery. According to statistics, the recurrence rate of gastric cancer in our country is about 40.0% -60.0% after radical surgery and 50.0% -70.0% in advanced patients. The median survival time after recurrence and metastasis is only 3 ~ 24 months ~ ([2]). Follow-up of patients with recurrence of observation, early diagnosis and recurrence