Purpose: Jeopardizing cure and risking high local recurrence have served as arguments against sphincter-saving resection for patients with distal third rectal cancer. This prospective study examines and compares the local recurrence and survival rates in patients with distal third rectal cancer treated by either coloanal anastomosis or abdominoperineal resection.
Methods: Between 1977 and 1993, 174 patients underwent coloanal anastomoses and 38 patients underwent abdominoperineal resection. All tumors were located 4 to 7 cm from the anal verge. One hundred ninety-three patients (91 percent) underwent rectal excision with a curative intent. Mean follow-up was 66 months after sphincter-saving resection and 65 months after abdominoperineal resection.
Results: Mean anastomotic height from the anal verge was 2.3 cm after sphincter-saving resection. Overall local recurrence rate was 7.9 percent after sphincter-saving resection and 12.9 percent after abdominoperineal resection. The five-year actuarial survival rate was 78 percent after sphincter-saving resection and 74 percent after abdominoperineal resection.
Conclusion: Local recurrence and survival are not compromised in patients with distal third rectal cancer when treated by sphincter-saving resection, provided that oncologic principles are not violated. Coloanal anastomosis can be performed with an acceptable morbidity.
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