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What is A 4-year-old boy is seen after he suddenly develops a fever, abdominal pain and tenderness, hematuria, and palpable purpuric skin lesions on his buttocks and the extensor surfaces of the arms and legs. The most likely diagnosis is and explain in detail?
Henoch-Schonlein purpura- IgA immune complex disease, Involvement of small vessels (venules, capillaries, aerioles) with multiple lesions The disorder may involve only the skin, presenting as palpable purpura, or it may involve a variety of other sites, including the glomeruli, gastrointestinal tract, lungs, or brain. Thrombocytopenia is not seen in Henoch-Schonlein purpura (HSP)