Clinical Research Directory

Inclusion Criteria: : histological proven primary gastric adenocarcinoma * no evidence of other distant metastasis * R0 resection * laparoscopic or robotic gastrectomy * and reconstructed by Roux-en-Y reconstruction or the Billroth II procedure * patient with appropriate conditions of activity; 0 or 1 on Eastern Cooperative Oncology Group (ECOG) scale * patient who have not previously received chemotherapy or radiation treatment in the abdomen. * patinet who signed the consent form * cTNM stage I or II or III Exclusion Criteria: * active double cancer (synchronous and metachronous double cancer within 5 disease-free years), * carcinoma in situ, * open gastrectomy, * reconstructed by Billroth I procedure, * gastric cancer recurrence, ;a history of gastrectomy. ; * a patient who has the history of abdominal surgery except laparoscopic appendectomy and gallbladder resection, and laparoscopic gynecologic surgery due to benign disease, and Cesarean section. * a patient who need co-ordination for other organs in preoperative examination (However, laparoscopic cholecystectomy is included in the selection criteria due to gallbladder polyps, and gallbladder disease). * Pregnant women, lactating women * a patient with mental illness (a person diagnosed with mental illness in medical records) * a patient who are taking corticosteroid whole-body (including herbal medicine) * a patient who has an uncontrolled history of angina or myocardial infarction within six months of the study; * uncontrolled hypertension * a patient who has a serious respiratory disease that requires continuous oxygen therapy;