Squamous-cell carcinoma of the colon

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Abstract
Primary squamous-cell and adenosquamous-cell carcinoma of the colon are uncommon and their characteristics not well known. This paper reports the clinical features and pathologic findings of two colonic adenosquamous carcinomas and reviews other reports of adenosquamous and squamous carcinoma of the colon from the English medical literature. Including these two cases, 63 cases have been reported since 1927. Of these, six occurred in patients with ulcerative colitis, three occurred at the colonic opening of chronic colocutaneous fistulas, and concomitant schistosomiasis was present in two patients. Synchronous squamous-cell carcinoma of the colon was present in 3.2 percent of cases and 10 percent had either antecedent, synchronous, or metachronous adenocarcinoma of the colon. These lesions appeared to be distributed uniformly throughout the colon. The five-year survival after resective therapy for primary squamous-cell and adenosquamous-cell carcinoma of the colon calculated with life table analysis is 50 percent for Dukes' B lesions, 33 percent for Dukes' C lesions, and 0 percent for Dukes' D lesions.

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