title: [The epithelial junctional zones of the anal canal and cervix uterus: the ultrastructure of tumors of these zones].
abstract: Relationships between squamous and columnar epithelia in the anal canal and cervix uteri of postnatal period and fetus were studied. The transitional stratified epithelial lining, which is called junctional epithelium, is interposed between the mentioned epithelia. The junctional epithelium has variable numbers of layers of epidermoid cells, which differ from cells of atypical squamous epithelium by some ultrastructural features of the cytoskeleton and cell surface and by a low content of glycogen. The hypothesis on the physiological significance of this epithelium is proposed. Ultrastructural features of the cytoskeleton and cell surface suggest that anal basaloid carcinomas and some cervical squamous carcinomas may develop from so-called junctional epithelium.
authors: A P
authors: AP
authors: Chernyĭ
authors: N I
authors: NI
authors: Iakovleva
mesh_terms: D000230:Adenocarcinoma / Q000648:ultrastructure; D001003:Anal Canal / Q000196:embryology / Q000648:ultrastructure*; D001005:Anus Neoplasms / Q000648:ultrastructure*; D002294:Carcinoma, Squamous Cell / Q000648:ultrastructure; D002295:Carcinoma, Transitional Cell / Q000648:ultrastructure; D002584:Cervix Uteri / Q000196:embryology / Q000648:ultrastructure*; D004848:Epithelium / Q000196:embryology / Q000648:ultrastructure; D005260:Female; D005865:Gestational Age; D006801:Humans; D007365:Intercellular Junctions / Q000648:ultrastructure*; D008854:Microscopy, Electron; D002583:Uterine Cervical Neoplasms / Q000648:ultrastructure*
vernacular_title: Epitel'ial'nye stykovye zony anal'nogo kanala i sheĭki matki: ul'trastruktura nekotorykh opukholeĭ étikh zon.