[Direct and reservoir colonic-anal anastomoses. Short and long term results]

This retrospective study was designed to assess the operative, oncologic and functional results of total proctectomy with coloanal anastomosis (CAA).

Between 1990 and 1994, 81 patients (44 males/37 females: mean age: 59 years) were operated for a cancer (n = 67) or a benign lesion (n = 14) of the rectum. Sixty-four patients had a straight CAA and 17 patients had a colonic J-pouch.

There was no operative mortality. Two patients were reoperated for colonic necrosis and underwent abdominoperineal resection. An anastomotic leak was observed in 11 patients and its severity was decreased by a diverting stoma. An anastomotic stricture was observed in 10 patients. Of the 67 patients with cancer, 19 (28%) developed metastases and 11 (16%) developed local recurrence. The 5-year survival rate was 69%. Twelve months after the operation, continence was similar with the two types of CAA, but the mean daily stool frequency was lower in patients with a reservoir. With a long follow-up (mean = 9 years), functional results were good with regard to continence and stool frequency, almost similar with the two types of CAA; functional disorders (noctumal stools, fragmentation, urgency) were reported by 25 to 40% of patients.

Total proctectomy with coloanal anastomosis yields good oncologic results. With regard to functional results, the superiority of the colonic J-pouch, which is observed in the first postoperative year, was lost beyond this period; long-term results are good for continence and stool frequency, but some disorders persist in a significant proportion of patients.