<prompt> Target lesions are characteristic ofDermatitis herpetiformisSulpha drug reactionLichen planusErythema multiformae  <response>: Target lesions- Iris lesions: these are pathognomic of erythema multiforme. commonly found on the extremities especially hands. there are three zones of color change: 1. central dark or sometimes blistered area 2.surrounded by pale odematous zone 3.inturn rimmed by another zone of odema IADVL textbook of dermatology, principles of clinical diagnosis,page 106. 