Clinical Research Directory

Inclusion Criteria: * ① The native place is in Shaanxi Province, Gansu Province, Qinghai Province, Ningxia Hui Autonomous Region, Xinjiang Uygur Autonomous Region; * The criteria for patients undergoing laparoscopic radical total gastrectomy include: primary adenocarcinoma of the stomach in the upper third or middle third confirmed by histology; Patients with preoperative diagnosis of clinical T2-T4a (cT2-T4a) gastric cancer were free of tumor invasion of neighboring organs (pancreas, spleen, liver, and transverse colon), paraaortic or splenic hilar lymph node enlargement or fusion, and distant metastases as shown by preoperative abdominal computed tomography (CT), abdominal ultrasound, and endoscopic ultrasound; According to the postoperative pathological diagnosis, total gastrectomy, D2 lymph node resection and radical R0 resection were performed. Exclusion Criteria: * ① Patients who did not fully expose the anatomic characteristics of splenic hilar vessels or had evidence of peritoneal spread or distant metastasis during laparoscopic radical gastrectomy; * Patients with incomplete clinical data;