title: Unilateral lichen planus: an unusual presentation.
mesh_terms: D000279:Administration, Cutaneous; D003877:Dermatitis, Contact / Q000209:etiology; D006801:Humans; D008010:Lichen Planus / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D005996:Nitroglycerin / Q000008:administration & dosage / Q000009:adverse effects
chemical_list: D005996:Nitroglycerin