title: Hyperpigmented keratotic nodules: acquired perforating collagenosis.
authors: Queen's Medical Centre, Nottingham, England.
authors: Ser Ling
authors: SL
authors: Chua
authors: Kusum
authors: K
authors: Kulkarni
authors: Eric
authors: E
authors: Saihan
mesh_terms: D003095:Collagen Diseases / Q000175:diagnosis / Q000473:pathology*; D005260:Female; D006801:Humans; D017495:Hyperpigmentation / Q000175:diagnosis / Q000473:pathology*; D007642:Keratosis / Q000175:diagnosis / Q000473:pathology*; D008875:Middle Aged; D012867:Skin / Q000473:pathology