lichen planus
Definition: eruption of flat-topped, shiny, violaceous papules on flexor surfaces, male genitalia, and buccal mucosa of unknown cause; may form linear groups; microscopically characterized by a bandlike subepidermal lymphocytic infiltrate. Spontaneous resolution is common after months to years.
Search Stedman's Medical Dictionary
Examples: glitazone, GI cocktail, etc.
