The effect of surgical approach on short-term oncologic outcomes in rectal cancer surgery

Background Although evidence to support the use of laparoscopic and robotic approaches for the treatment of rectal cancer is limited, these approaches are being adopted broadly. We sought to investigate national practice patterns and compare short-term oncologic outcomes of different approaches for rectal cancer resections. Methods The 2010 National Cancer Database was queried for operative cases of rectal cancer. Approach was classified as open, laparoscopic, or robotic. Patient, tumor, and hospital characteristics and surgical margin status were evaluated. Propensity score matching was used to compare outcomes across approaches. Results We identified 8,712 patients. Laparoscopic and robotic approaches were more common in privately insured and wealthier patients at high-volume centers (P <.001). Open approaches were used for tumors with higher histologic grade and pathologic stage (P <.001). A minimally invasive approach was associated with fewer positive margins and shorter hospital stays. After propensity score matching, the laparoscopic approach was associated with a 2.0% lesser (P =.01) and robotic surgery with a 3.8% lesser (P =.004) incidence of positive margins compared with open surgery. Conclusion An open approach is often used in rectal cancers with higher pathologic stages. Matched patient analysis suggests minimally invasive approaches are associated with improved R0 resections.