title: Proliferation of melanocytes in keratoacanthoma.
mesh_terms: D000368:Aged; D002455:Cell Division; D005260:Female; D006801:Humans; D007636:Keratoacanthoma / Q000473:pathology*; D008297:Male; D008544:Melanocytes / Q000473:pathology*; D012871:Skin Diseases / Q000473:pathology*