Basal cell epithelioma.
D002280:Basal Cell Carcinoma / Q000648:ultrastructure*; D006801:Humans; D008297:Male; D008855:Microscopy, Electron, Scanning; D008875:Middle Aged; D012867:Skin / Q000648:ultrastructure; D012878:Skin Neoplasms / Q000648:ultrastructure*