title: Lichen planus caused by pyrimethamine.
mesh_terms: D000328:Adult; D003875:Drug Eruptions / Q000209:etiology*; D006801:Humans; D008010:Lichen Planus / Q000139:chemically induced* / Q000473:pathology; D008297:Male; D011739:Pyrimethamine / Q000009:adverse effects*
chemical_list: D011739:Pyrimethamine