butterfly rash(redirected from Malar rash)
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a temporary eruption on the skin.
butterfly rash a skin eruption across the nose and adjacent areas of the cheeks in the pattern of a butterfly, as in lupus erythematosus and seborrheic dermatitis. (See Atlas 2, Part B).
diaper rash irritant dermatitis in the area in contact with the diaper in infants, often sparing the genitocrural folds, occurring as a reaction to prolonged contact with urine and feces, retained soaps and topical preparations, and friction and maceration, and commonly associated with secondary bacterial and yeast infections, especially with Candida albicans. Some consider irritation by the ammoniac decomposition products of urine to be a contributing factor. Called also diaper dermatitis.
drug rash drug eruption.
heat rash miliaria.
1. Any structure or apparatus shaped like a butterfly with outstretched wings.
A lesion on each cheek and across the bridge of the nose, seen in systemic lupus erythematosus and seborrheic dermatitis.
DiffDx, butterfly region rashes AIDS, ataxia-telangiectasia, Bloom syndrome, Cockayne syndrome, dermatomyositis, erysipelas, pemphigus foliaceus, pemphigus erythematosus, riboflavin deficiency, tuberous sclerosis with smooth, red-yellow papules—adenoma sebaceum—appearing by age 4 at the nasolabial fold