title: JAAD Grand Rounds quiz: Red-brown hyperkeratotic papules in a 69-year-old man.
authors.affiliation: Hershey, Pennsylvania.
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Piotrowski
authors.affiliation: Hershey, Pennsylvania.
authors.forename: Holly
authors.initials: H
authors.lastname: Gunn
authors.affiliation: Hershey, Pennsylvania.
authors.forename: Joslyn
authors.initials: J
authors.lastname: Kirby
authors.affiliation: Hershey, Pennsylvania.
authors.forename: Liaqat
authors.initials: L
authors.lastname: Ali
authors.affiliation: Hershey, Pennsylvania.
authors.forename: Klaus
authors.initials: K
authors.lastname: Helm
mesh_terms: D000368:Aged; D001707:Biopsy, Needle; D018450:Disease Progression; D005076:Exanthema / Q000175:diagnosis / Q000209:etiology; D005472:Fluorouracil / Q000627:therapeutic use*; D005500:Follow-Up Studies; D006801:Humans; D007150:Immunohistochemistry; D007642:Keratosis / Q000175:diagnosis / Q000188:drug therapy* / Q000473:pathology*; D008297:Male; D035583:Rare Diseases; D018570:Risk Assessment; D012720:Severity of Illness Index; D056164:Teaching Rounds
chemical_list: D005472:Fluorouracil