General Tissue Response Classification System After Chemotherapy

This research intend to collect the information of gastric cancer patients who received preoperative neoadjuvant chemotherapy and radical gastric ectomy at Department of Gastrointestinal Surgery, West China Hospital, Sichuan University. Base on The degree of edema, intraoperative effusion, fibrosis of connecting tissues, the investigators aim to constitute the core parameters of the tissue response grading system following neoadjuvant chemotherapy, and explore the mutual effect among the tissue response grading system, tumor regression response and long-term survival outcome of tumor patients.