title: Habit tic deformity secondary to guitar playing.
abstract: A 29-year-old man exhibited linear ridges of the right thumbnail that had been present for ten years. After he stopped playing the guitar for three months, the proximal portion of the abnormality cleared. Nail changes similar to the habit tic deformity may be produced by guitar playing.
authors.affiliation: Department of Dermatology, Kaiser Permanente Los Angeles Medical Center, Los Angeles, California. jashinwu@hotmail.com
authors.forename: Jashin J
authors.initials: JJ
authors.lastname: Wu
mesh_terms: D000328:Adult; D012090:Cumulative Trauma Disorders / Q000175:diagnosis* / Q000209:etiology; D006184:Habits; D006686:Hobbies; D006801:Humans; D008297:Male; D009146:Music; D009262:Nails / Q000293:injuries*; D009264:Nails, Malformed / Q000209:etiology*; D013933:Thumb / Q000293:injuries*