<prompt> The Iris lesions are pathognomonic ofSLEErythema MultiformeApthous ulcersDLE  <response>: Erythema MultiformeThe classic skin lesion consists of a central blister or necrosis with concentric rings of variable color around it called typical target or iris lesion that is pathognomonic of EM;variants are called atypical target lesions Figure 4-16. The skin may feel itchy and burnt. Postinflammatory hyperpig - mentation is common in dark-skinned individuals and may be worsened by sun exposure. 