827 patients with gastric cancer underwent 236 robotic and 591 laparoscopic radical gastrectomies with curative intent. The patients' data were prospectively collected and retrospectively analyzed.
Main Outcome Measures:We performed a comparative analysis between the robotic surgery group and laparoscopic surgery group for preoperative patient characteristics, intraoperative factors, and postoperative morbidity and mortality.Results: The robotic group was younger than the laparoscopic group, but other preoperative patient charac-teristics did not differ. The mean operative time for the robotic group (219.5 minutes) was on average 49 minutes longer than the laparoscopic group (170.7 minutes) (P Ͻ .001), while mean blood loss was significantly less in the robotic group (91.6 mL vs 147.9 mL; P=.002). The robotic group had mortality of 0.4% and morbidity of 11.0%, comparable with those of the laparoscopic group (P Ͼ .05). The number of lymph nodes retrieved per level was adequate in both groups and did not differ significantly. Robotic D1ϩ␣ (n = 5), D1ϩ (n=126), and D2 (n=105) dissections retrieved 27.2, 36.7, and 42.4 mean numbers of lymph nodes, respectively. Except for 3 cases in the laparoscopic group, all specimens had negative margins.Conclusions: Our largest comparative study demonstrates robotic gastrectomy to have better short-term and comparable oncologic outcomes compared with laparoscopic gastrectomy. A robotic approach to gastric cancer is a promising alternative to laparoscopic surgery.