Sudden purpuriform rash in an infant

摘要

A10-MONTH-OLD BOY PRESENTS-WITH ERYTHEMATOUS SWELLING OF BOTH ears and right eyelid and erythematous perioral macules following a respiratory tract infection 12 days before presentation (Figure, A). Within 4 days the lesions increased in size, becoming large erythematous plaques on the face (Figure, B). Targetoid, purpuric lesions developed on the limbs (Figure, C), along with hand edema. There were no trunk lesions and no involvement of the mucous membranes. The child is otherwise in good general health. On examination he is afebrile, has normal vital signs, and there is no lymphadenopathy or organomegaly. Findings from urinalysis, complete blood cell count, coagulation studies, and liver and kidney function studies are unremarkable.