Long-term functional results from a randomized clinical study of transverse coloplasty compared with colon J-pouch after low anterior resection for rectal cancer

BackgroundThe colonic pouch is considered as an alternative to the standard straight low anastomosis after resection for rectal cancer. The aim of this prospective randomized trial was to compare short- and long-term functional results of colonic J-pouch (CJP) and transverse coloplasty (TCP) after low anterior resection for rectal cancer.MethodsBetween 2000 and 2005, patients with mid or low rectal cancer scheduled for an elective sphincter-preserving resection were eligible. The primary end point was to compare bowel functional results 6 months and 3 years after ileostomy closure. Fecal incontinence score and a questionnaire that included items for clinical evaluation of bowel function were used.ResultsOne-hundred six patients were randomized; 54 patients were allocated to the CJP group and 52 in the TCP group. There were no differences between the 2 groups in terms of demographic and clinical data. Overall, postoperative complication rate was 19.8% without differences between the groups. Two patients (1.9%; one in each group) presented with anastomotic dehiscence. Long-term incomplete evacuation rates were 29.2% in the CPT group and 33.3% in the CJP group, without substantial differences. Overall, short- and long-term functional outcomes of both procedures were comparable. No differences were observed in terms of fecal incontinence or in all the items included in the questionnaire.ConclusionTCP reconstruction after rectal cancer resection and coloanal anastomosis is functionally similar to CJP both in short- and long-term outcomes. The TCP technique does not seem to improve significantly the incomplete defecation symptom respect to CJP. Registration number: NCT01396928; http://register.clinicaltrial.gov.