The efficacy of three different reconstruction methods after proximal gastrectomy will be investigated in this study through a prospective, multicenter, randomized controlled trial.
Age between 20-75 years old, male or female;
Pathological diagnosis of preoperative endoscopic biopsy: the tumor is located in the upper 1/3 of the stomach (including the esophagogastric junction), and the clinical staging of gastric cancer： Ia and Ib (T1N0M0, T1N1M0, and T2N0M0) (14) according to the eighth edition of the AJCC (15);
No distant metastasis observed on preoperative chest radiograph, abdominal ultrasound or upper abdominal CT;
ASA grade 1-3;
Patients diagnosed with primary tumors or distant metastasis;
Patients whose tumor is located in the greater curvature side of the stomach;
Patients with coagulation dysfunction which could not be corrected;
Patients who were diagnosed with viral hepatitis and cirrhosis;