Tailored Management with Highly-Selective Diversion for Low Colorectal Anastomosis: Biochemical Postoperative Follow-Up and Long-Term Results from a Single-Institution Cohort.

Abstract

Defunctioning stoma (DS) can decrease the rate of symptomatic anastomotic leakage (AL). Since 2010, we have used tailored, highly selective DS management for low colorectal anastomosis (LCRA). In total, 433 rectal cancer patients underwent the same standardized procedure. Non-stoma (NS) management was used in patients with no surgical difficulties as well as good colonic preparation and quality of anastomoses. In all other cases, DS was used. C-reactive protein was measured during postoperative follow-up. Imbalance in the initial population was adjusted using propensity-score matching according to sex, age, body mass index, tumor location, and American Society of Anesthesiologists score. Rate of AL within 30 days, 5-year overall survival, local relapse-free survival, and disease-free survival were recorded. Anastomosis was mostly ultra-low and was performed equally by laparoscopy or robotic surgery. The overall rate of AL was 13.4%, with no significant differences between groups (DS, 12.2%; NS, 14.6%; p=0.575). Operative time, blood loss, and hospital stay were significantly lower for NS patients. The rate of secondary stoma was 11.4% overall. Pathological results were similar, with a 98% R0 resection rate. With a median follow-up of 5.5 years for the NS and DS groups, the overall survival was 84.9% and 73.4%, respectively (p=0.064), disease-free survival was 67.0% and 55.8%, respectively (p=0.095), and local relapse-free survival was 95.2% and 88.7%, respectively (p=0.084). The long-term, stoma-free rate was 89.1% overall. Tailoring DS for LCRA seems safe and could provide potential benefits in postoperative morbidity with the same long-term oncological results in NS patients. Prospective, multicentric studies should validate this approach.