Intervention: According to tumor pathological stage (JGCA, 2nd English ed), location of tumor, and patient clinical condition, a laparoscopy-assisted radical gastrectomy and open gastrectomy were performed. Laparoscopy-assisted radical gastrectomy consisted of the following procedures: 1) laparoscopic dissection of the lesser and greater omentum, ligation and division of the main vessels to mobilize the stomach under pneumoperitoneum, 2) laparoscopic D2 lymph node dissection, based on the Guidelines of the Japan Gastric Cancer Association and 3) resection of the distal two thirds (LADG), proximal third (LAPG), or total stomach (LATG), depending on the location of the tumor, followed by reconstruction by the Billroth I, Billroth Ⅱ, esophagogastrostomy, or Roux-en-Y method through a 3 to 5-cm-long minilaparotomy incision.