title: [Cloacogenic cancer of the rectum].
abstract: Three cases of cloacogenous and 35 cases of squamous-cell carcinoma of the distal part of the rectum and anus were studied and compared histochemically to reveal considerable differences in mucopolysaccharides contained by the tumours. Squamous-cell carcinomas were characterized by the presence of glycogen which was not detected in cloacogenous carcinomas. In squamous-cell carcinomas, glycosamine glycanes were represented by sulfo- and sialo-mucin, while cloacogenous carcinomas largely contained a non-sulfated mucosubstance. The evidence obtained allows one to distinguish, among anal carcinomas of the rectum, a group of cloacogenous carcinomas that arose from the transitional epithelium of the serrate line and that differ from squamous-cell carcinomas in specific metabolic processes.
mesh_terms: D001003:Anal Canal / Q000473:pathology*; D002294:Carcinoma, Squamous Cell / Q000032:analysis / Q000473:pathology; D003937:Diagnosis, Differential; D006003:Glycogen / Q000032:analysis; D006025:Glycosaminoglycans / Q000032:analysis; D006801:Humans; D009373:Neoplasms, Germ Cell and Embryonal / Q000032:analysis / Q000473:pathology*; D012004:Rectal Neoplasms / Q000032:analysis / Q000473:pathology*
chemical_list: D006025:Glycosaminoglycans; D006003:Glycogen
vernacular_title: Kloakogennyĭ rak lriamoĭ Kishki.