title: Ethambutol-induced lichenoid eruption.
abstract: The tuberculostatic drug ethambutol is an infrequent skin offender. A lichenoid skin eruption restricted to the light-exposed areas in a 67-year-old male was proved by withdrawal and challenge to be caused by ethambutol. Patch tests with ethambutol 0.1%, 0.5% and 1% in watery solution were negative.
mesh_terms: D000368:Aged; D004977:Ethambutol / Q000009:adverse effects*; D006801:Humans; D008010:Lichen Planus / Q000139:chemically induced* / Q000473:pathology; D008297:Male
chemical_list: D004977:Ethambutol