EP.TH.959Meta-analysis of temporary loop ileostomy closure during or after adjuvant chemotherapy following rectal cancer surgery: An ongoing dilemma

Aims To evaluate comparative outcomes of temporary loop ileostomy closure during or after adjuvant chemotherapy following rectal cancer resection. Methods We systematic searched MEDLINE; EMBASE; CINAHL; CENTRAL; the World Health Organization International Clinical Trials Registry; ClinicalTrials.gov; ISRCTN Register, and bibliographic reference lists. Overall perioperative complications, anastomotic leak, surgical site infection, ileus and length of hospital stay were the evaluated outcome parameters. Combined overall effect sizes were calculated using fixed-effect or random-effects models. Results We identified 4 studies reporting a total of 436 patients comparing outcomes of temporary loop ileostomy closure during (n = 185) or after (n = 251) adjuvant chemotherapy following colorectal cancer resection. There was no significant difference in overall perioperative complications (OR 1.39; 95% CI 0.82-2.36, p = 0.22), anastomotic leak (OR 2.80; 95% CI 0.47-16.56, p = 0.26), surgical site infection (OR 1.97; 95% CI 0.80-4.90, p = 0.14), ileus (OR 1.22; 95% CI 0.50-2.96, p = 0.66) or length of hospital stay (MD 0.02; 95% CI -0.85-0.89, p = 0.97) between two groups. Between-study heterogeneity was low in all analyses. Conclusions The meta-analysis of best, albeit limited, available evidence suggests that temporary loop ileostomy closure during adjuvant chemotherapy following rectal cancer resection may be associated with comparable outcomes to closure of ileostomy after adjuvant chemotherapy. We encourage future research to concentrate on completeness of chemotherapy and quality of life which can determine appropriateness of either approach.