CLOACOGENIC CARCINOMA

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Abstract
The anatomy of the cloacogenic zone, the malignant diseases that may arise therein, the clinical features of cloacogenic carcinoma, and its prognosis, are reviewed. Barium enema examinations of 7 patients are described. The roentgenographic appearance in 6 of these was similar. The lesion was plaque-like, smooth, or finely ulcerated, and located just at the anorectal junction. The upper and lower borders were well defined. This complex of changes is not usually seen in other anal or rectal carcinomas and strongly suggest-s cloacogenic carcinoma. The atypical cloacogenic carcinoma arising from anal ducts in a location separated from the cloacogenic zone is probably indistinguishable from other carcinomas of that area.

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