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Radiology, Vol 191, 569-572, Copyright © 1994 by Radiological Society of North America

ARTICLES

Cancer of the anal canal: treatment with chemotherapy and low-dose radiation therapy

DE Smith, KH Shah, AR Rao, DB Frost, F Latino, PJ Anderson, AV Peddada and AR Kagan
Department of Radiation Oncology, Kaiser Permanente Medical Center, Los Angeles, CA 90027.

PURPOSE: To determine the efficacy of a standardized protocol of chemotherapy and low-dose radiation therapy in treatment of patients with anal canal cancer. MATERIALS AND METHODS: Forty-two consecutive patients with anal canal cancer were treated with 15 fractions of 30-Gy photon beam radiation therapy administered anteroposterior- posteroanterior in conjunction with chemotherapy with 5-fluorouracil and mitomycin C. Survival analysis was performed with the lifetest procedure. RESULTS: In patients with stage T1 and T2 tumors, 26 of 29 (90%) were free of disease after chemotherapy and radiation therapy and had no recurrent tumors. In patients with stage T3 and T4 tumors, five of 13 (38%) were free of disease after therapy and had no recurrences. CONCLUSION: This therapy is effective for epidermoid cancers of the anal canal that are smaller than 5 cm regardless of nodal status. Tumors larger than this or that invade adjacent structures are not adequately controlled with this protocol.




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