Clinical Research Directory

Inclusion Criteria: 1. patients within 18--75 years old; 2. patients with a preoperative pathological diagnosis of gastric adenocarcinoma; 3. patients with a clinical tumor stage of T1N1,T2N0 according to the preoperative examinations (gastroscopy, ultrasound gastroscopy and computed tomography); 4. patients with a plan to undergo laparoscopic distal gastrectomy and obtain R0 surgical results; 5. patients without severe heart, liver, lung, or kidney dysfunction; 6. patients with an Eastern Cooperative Oncology Group performance status (ECOG PS) of 0-1; and (7) patients with American Society of Anesthesiologists (ASA) I-II. Exclusion Criteria: 1. patients with a history of upperabdominal surgery; 2. patients who presentedas an emergency case; 3. patients with other histories of malignant diseases within 5 years; 4. patients with prior neoadjuvant chemotherapy or radiation therapy; and (5)patients who need simultaneous surgical treatment for other malignant diseases.