'Onycholemmal' horn.
A lesion clinically and histologically mimicking trichilemmal horn was observed in the nail apparatus of a 62-year-old woman. The term 'onycholemmal horn' is proposed for this lesion.
D001913:Bowen's Disease / Q000175:diagnosis* / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008875:Middle Aged; D009260:Nail Diseases / Q000175:diagnosis / Q000473:pathology; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000473:pathology