Are oncological long-term outcomes equal after laproscopic completed and converted laparoscopic converted rectal resection for cancer?

Background The aim of this study was to compare long-term survival after laproscopic completed and laparoscopic converted rectal resection for cancer. Methods All consecutive patients who underwent curative laparoscopic rectal surgery for cancer at our institution between January 2001 and December 2016 were included in a single-center retrospective study. Patients were divided into two groups: the converted (CONV) group and the totally laparoscopic (LAP) group. The primary outcomes were long-term oncologic outcomes including overall survival (OS) and disease-free survival (DFS), as well as local and distant recurrence (LR, DR). The secondary outcomes included postoperative mortality and morbidity as defined as death or any complication occurring within 90 days postoperatively. Results Of 214 consecutive patients included, 57 were converted to open surgery (CONV group), leading to a 26.6% conversion rate. Mean length of follow-up was 68 +/- 42 months in the LAP group and 70 +/- 41 months in the CONV group. Five-year OS was significantly shorter in the CONV group compared to the LAP group (p = 0.0016). On multivariate analysis, rectal tumor location (middle and low) and conversion to open surgery were predictors of both OS and DFS. Conclusions This study suggests that conversion to open surgery after laparoscopic rectal resection appears to significantly reduce OS without having a significant impact on DFS and recurrence rates.