Long-term oncologic and surgical outcomes of robotic and laparoscopic gastrectomy for Siewert II/III esophagogastric junction carcinoma: A propensity score-matched retrospective cohort study

Abstract

BackgroundThis study aimed to investigate the short-term surgical and long-term survival outcomes after robotic gastrectomy (RG) or laparoscopic gastrectomy (LG) for patients with Siewert type II and III adenocarcinoma of the esophagogastric junction (AEG). MethodsWe retrospectively analyzed 84 and 312 patients with Siewert type II/III AEG who underwent RG or LG between January 2005 and September 2016 in our center. We performed a 1:2 matched propensity score matching (PSM) analysis between the RG and LG group for clinical features to reduce confounding bias. Additionally, the long- and short-term outcomes between the RG and LG group were compared. ResultsThe clinicopathological characteristics of 246 patients (RG group: n = 82; LG group: n = 164) were well balanced after PSM. Patients in the RG group showed less estimated blood loss, less time to first flatus, less time to first ambulation, less drainage tube removed time, and retrieved more lymph nodes than the LG group. The overall complication rate was comparable between the RG and LG groups. The 5-year overall survival (OS) was 44.4% in the RG group and 43.7% in the LG group (p = 0.898). The 5-year disease-free survival (DFS) was 43.2% in the RG group and 43.2% in the LG group (p = 0.990). The RG and LG groups exhibited a similar recurrence rate and pattern within 5 years after surgery. ConclusionRobotic gastrectomy could be a feasible and safe option for patients with Siewert II/III AEG in terms of surgical and oncologic outcomes.