Laparoscopic versus open surgery for rectal cancer after neoadjuvant chemoradiation: a matched case-control study of short-term outcomes

Abstract

Neoadjuvant chemoradiation (nCRT) currently is commonly incorporated into the multimodal treatment of locally advanced rectal cancers. This study aimed to compare the short-term outcomes and oncologic adequacy of laparoscopic and conventional open surgery for rectal cancer after nCRT. A series of 72 patients who underwent laparoscopic surgery (Lap group) for rectal cancer after nCRT were matched for type of surgery, gender, and American Society of Anesthesiologists (ASA) class with 72 patients who underwent conventional surgery during the same time period (Open group). The short-term outcomes were compared between the two groups of patients. No significant difference was found between the two groups in terms of age, distance of tumor from the anal verge, body mass index, or posttreatment pathologic stage of the disease. There were significant differences between the Lap and Open groups in terms of blood loss (median: 200 vs 400ml; P<0.001), duration of surgery (median: 270 vs 240min; P<0.001), time to passing of first flatus (median: 2 vs 3days; P<0.001), time to start of normal diet (median: 5 vs 6days; P<0.001), and hospital stay (median: 12 vs 15days; P<0.001). A significant difference in the number of lymph nodes harvested was not identified between the two groups, although more patients in the Open group had a positive circumferential resection margin than in the Lap group (10 vs 1%; P=0.03). The short-term benefits of laparoscopic surgery also were observed when the 64 patients who underwent abdominoperineal resection (APR) in each of the two groups were compared separately. Laparoscopic surgery for rectal cancer, especially laparoscopic APR, after nCRT is safe and associated with earlier recovery of bowel function, a shorter hospital stay, and an oncologically adequate specimen compared with conventional open surgery.