Abstract
An 11-month-old boy presented with a 3-day history of a generalized, rapidly progressive eruption. It began with pruritic erythematous papules, and expanded into nonblanching ecchymotic urticarial plaques (Figs 4-6). There was no mucosal involvement. He had one episode of diarrhea on the day the rash appeared but was otherwise asymptomatic. His personal and family medical histories were noncontributory and he had taken no medications.14.The most likely diagnosis is (Choose single best response.)a.Henoch-Schönlein purpurab.acute hemorrhagic edema of infancyc.drug eruptiond.erythema multiformee.acute urticaria15.This diagnosis is generally not made for children older than what age (Choose single best response.)a.12 monthsb.2 yearsc.3 yearsd.4 yearse.5 years16.The characteristic histologic finding of this condition is (Choose single best response.)a.dermal hypersensitivity reactionb.superficial perivascular lymphocytic infiltrate with erythrocyte extravasationc.leukocytoclastic vasculitisd.interface dermatitis with necrotic keratinocytese.normal skin17.What type of perivascular immunoglobulin deposition is seen in one third of these cases (Choose single best response.)a.IgAb.IgDc.IgGd.IgEe.IgM18.The most commonly seen sequela of this disease is (Choose single best response.)a.juvenile arthritisb.nephritisc.recurrenced.gastrointestinal bleedinge.none
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