The long-term clinical outcomes of robotic gastrectomy for gastric cancer: a large-scale single institutional retrospective study.

BACKGROUNDS AND PURPOSE Robotic surgery has been applied in gastric carcinoma over a decade. Although a series of studies were performed to investigate the short-term outcomes of robot-assisted gastrectomy, few papers were in view of long-term outcomes. The current study was aimed to explore the oncological outcomes of robotic gastrectomy for gastric cancer patients. METHODS A total of 606 gastric cancer patients who underwent robot-assisted gastrectomy during March 2010 through March 2017, were enrolled in this research. The clinicopathologic characteristics, surgical procedures along with follow-up information and prognostic factors were recorded in detail. The disease-free survival and overall survival rates were tested by Kaplan-Meier analysis. RESULTS All the patients underwent the robotic surgery including 15 proximal gastrectomies, 403 distal gastrectomies, 169 total gastrectomies and 19 remnant gastrectomies. Fifiy-six (9.24%) patients were lost in the follow-up process (3-87 months, a media of 42 months). There were 119 recurrences observed, including 55 local recurrences, 51 peritoneal metastasis and 13 distant metastasis. The 3-year disease-free survival and overall survival were 73.60% and 74.24%, while the 5-year disease-free survivorship and overall survival rates were 68.73% and 69.33%. The 5-year overall survival rates grouped based on TNM stage were 96.58% for IA, 88.16% for IB, 87.03% for IIA, 80.62% fo IIB, 58.50% for IIIA, 48.62% for IIIB, 45.32% for IIIC and 17.03% for IV. CONCLUSION Robot-assisted gastrectomy is a valuable procedure for gastric cancer patients. Beside its feasibility and safety, it reveals an acceptable long-term clinical outcome.