[Cloacogenic carcinoma].

A group of 8 claocogenic carcinomas was found to be rather heterogenic. An apparent histogenetic item turned into a mostly topographic term in which basaloid carcinoma prevailed. Proctodeal cloacogenic carcinomas could produce eccrine type tubular and cylindromatous structures. Urothelial structure hardly occurred in cloacogenic carcinoma. Differential diagnosis of anorectal tumours at large was discussed.