title: Metatypical carcinoma of the lower eyelid.
abstract: Metatypical (syn. basosquamous) carcinoma, a variant of basal cell carcinoma, is morphologically and biologically different from the types usually encountered: although metatypical carcinoma is morphologically different from squamous cell carcinoma, it metastasizes with nearly the same frequency.
mesh_terms: D002281:Carcinoma, Basosquamous / Q000473:pathology* / Q000648:ultrastructure; D005142:Eyelid Neoplasms / Q000473:pathology* / Q000648:ultrastructure; D005143:Eyelids / Q000473:pathology; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged