title: Lichen planus: possible mechanisms of pathogenesis.
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008010:Lichen Planus / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D013280:Stomatitis / Q000209:etiology*; D013601:T-Lymphocytes / Q000145:classification*