Impact of pelvic radiotherapy on morbidity and durability of sphincter preservation after coloanal anastomosis for rectal cancers.

Abstract

PURPOSE:

This study was designed to assess the impact of pelvic radiotherapy on the incidence of complications and colostomy-free survival of patients after a coloanal anastomosis for rectal cancer.

METHODS:

A total of 192 patients underwent a coloanal anastomosis between 1982 and 2001: 87 patients did not receive pelvic radiotherapy; 105 patients received pelvic radiotherapy (39 preoperative and 66 postoperative). Early and late complications requiring surgical intervention and the colostomy-free survival rate were assessed by retrospective review of patient records.

RESULTS:

After a median follow-up of 62 months, 151 patients were alive. The most frequent complication was development of an anastomotic stricture (5-year rate of a stricture, 16 percent; 95 percent confidence interval, 10-21). Patients receiving pelvic radiotherapy had a higher rate of complications other than anastomotic strictures, including fecal incontinence, fistulas, abscesses, and bowel obstructions compared with patients not receiving pelvic radiotherapy (5-year rate: 20 percent (95 percent confidence interval, 10-29) vs. 5 percent (95 percent confidence interval, 0-10); P = 0.001). Patients receiving pelvic radiotherapy had a lower colostomy-free survival than did patients not receiving pelvic radiotherapy (5-year colostomy-free rate: 72 percent (95 percent confidence interval, 62-84) vs. 92 percent (95 percent confidence interval, 86-98); P < 0.001). There was no significant difference in the colostomy-free survival of patients receiving preoperative and postoperative pelvic radiotherapy.

CONCLUSIONS:

After coloanal anastomosis, a significant number of patients will have complications requiring surgical intervention, and some will require a permanent colostomy. Pelvic radiotherapy, whether it is administered preoperatively or postoperatively, significantly increases the need for a permanent colostomy.

• Authors: Imran Hassan, David W Larson, Bruce G Wolff, Robert R Cima, Heidi K Chua, Dieter Hahnloser, Megan M O'Byrne, Dirk R Larson, John H Pemberton
• Journal: Diseases of the colon and rectum (Dis Colon Rectum) Vol. 51 Issue 1 Pg. 32-7 (Jan 2008) ISSN: 0012-3706 [Print] United States
• PMID: 18030527 (Publication Type: Journal Article)

Topics

• Adult
• Aged
• Aged, 80 and over
• Anal Canal (surgery)
• Anastomosis, Surgical
• Chi-Square Distribution
• Colon (surgery)
• Colostomy (statistics & numerical data)
• Female
• Humans
• Male
• Middle Aged
• Postoperative Complications
• Rectal Neoplasms (radiotherapy)
• Rectum (physiopathology)
• Risk Factors
• Statistics, Nonparametric
• Survival Analysis
• Treatment Outcome