title: Collagenous papules on the aural conchae.
abstract: Four cases of a new entity characterized by papules that are smooth in surface and unchanged in color on the aural conchae are reported. Histologically they are characterized by sclerotic and hyalinized masses within thickened dermis and by special stains and electron microscopy are revealed to consist of altered collagen.
mesh_terms: D000328:Adult; D003094:Collagen / Q000378:metabolism*; D003937:Diagnosis, Differential; D004431:Ear, External / Q000473:pathology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D012871:Skin Diseases / Q000175:diagnosis / Q000473:pathology*
chemical_list: D003094:Collagen