A child presents with fever, rash, and conjunctival injection; what is the likely diagnosis and key initial treatment?

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Multiple Choice

A child presents with fever, rash, and conjunctival injection; what is the likely diagnosis and key initial treatment?

Kawasaki disease is a pediatric vasculitis where prompt treatment aims to prevent coronary artery aneurysms. When a child has fever with conjunctival injection and a rash, KD should be high on the differential because these mucocutaneous findings reflect systemic inflammation that can involve the coronary arteries. The key initial management is urgent cardiology involvement and therapy that reduces inflammation and thrombosis risk. Administer intravenous immunoglobulin as a single high-dose infusion (about 2 g/kg) and start high-dose aspirin during the acute febrile phase (roughly 80–100 mg/kg/day in divided doses). After fever resolves, continue low-dose aspirin (about 3–5 mg/kg/day) for antiplatelet effect and monitor with echocardiography to assess for coronary artery involvement. Early treatment dramatically lowers the risk of coronary aneurysms. The other conditions can present with fever and rash but do not carry the same risk of coronary involvement or require IVIG; scarlet fever is treated with penicillin, measles involves vitamin A in certain cases, and roseola is managed with supportive care.

Kawasaki disease is a pediatric vasculitis where prompt treatment aims to prevent coronary artery aneurysms. When a child has fever with conjunctival injection and a rash, KD should be high on the differential because these mucocutaneous findings reflect systemic inflammation that can involve the coronary arteries. The key initial management is urgent cardiology involvement and therapy that reduces inflammation and thrombosis risk. Administer intravenous immunoglobulin as a single high-dose infusion (about 2 g/kg) and start high-dose aspirin during the acute febrile phase (roughly 80–100 mg/kg/day in divided doses). After fever resolves, continue low-dose aspirin (about 3–5 mg/kg/day) for antiplatelet effect and monitor with echocardiography to assess for coronary artery involvement. Early treatment dramatically lowers the risk of coronary aneurysms. The other conditions can present with fever and rash but do not carry the same risk of coronary involvement or require IVIG; scarlet fever is treated with penicillin, measles involves vitamin A in certain cases, and roseola is managed with supportive care.

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