title: Subungual basal cell carcinoma presenting as longitudinal melanonychia.
abstract: Subungual basal cell cancers are extremely rare, and a case is presented herein. This cancer had as its only manifestation the unique presence of a deeply pigmented streak in the nail for many years. Longitudinal melanonychia can signal baleful or banal conditions, and basal cell cancer must now be added to this list.
mesh_terms: D002280:Basal Cell Carcinoma / Q000150:complications* / Q000473:pathology; D005260:Female; D006801:Humans; D008543:Melanins; D008875:Middle Aged; D009260:Nail Diseases / Q000209:etiology*; D012878:Skin Neoplasms / Q000150:complications* / Q000473:pathology
chemical_list: D008543:Melanins