Sphincter preservation in patients with low rectal cancer treated with radiation therapy with or without local excision or fulguration.

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Abstract
Patients (26) with small cancers limited to the lower two thirds of the rectum were treated with conservative surgery and radiation therapy (XRT). The selection factors for this approach were age, refusal of a permanent colostomy, or the high risk of local recurrence because of inadequate surgical margin or palpable residual tumor after local surgical treatment alone. In patients treated with local excision or fulguration followed by XRT, there was a 6% local failure rate (1 in 17); in 16 of 17 patients receiving radiation doses above 4500 cGy [centrigrays], the local control was complete for follow-up periods of 6 mo. to 7 yr. In 9 patients treated with XRT for residual tumor, local failure occurred in 5 (56%). The disease-free survival for those without residual tumor vs. those with residual tumor was 88% and 44%, with median follow-up periods of 20 and 23 mo., respectively. Serious late complications occurred only if total doses were > 6300 cGy. Local excision combined with XRT proved to be a safe alternative to radical surgery in selected patients and resulted in excellent local control while allowing preservation of anal sphincter function.

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