title: [90-year-old male with a hyperkeratotic lichenoid skin eruption].
authors.forename: Julia
authors.initials: J
authors.lastname: Frühauf
mesh_terms: D000369:Aged, 80 and over; D002908:Chronic Disease; D003937:Diagnosis, Differential; D006801:Humans; D007642:Keratosis / Q000209:etiology* / Q000473:pathology*; D017512:Lichenoid Eruptions / Q000150:complications* / Q000473:pathology*; D008297:Male; D012883:Skin Ulcer / Q000209:etiology* / Q000473:pathology*