What is A 10-year-old child has recurrent signs and symptoms of palpable purpura on the buttocks, arthralgias, colicky abdominal pain, diarrhea, and microscopic hematuria. Which of the following is the most likely diagnosis? and explain in detail?
The child most likely has Henoch-Schonlein purpura, an immune complex vasculitis affecting the skin, GI tract, and renal glomeruli. Inciting antigens include upper respiratory tract infections, drugs, foods, and insect bites.