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?
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.
influenza
immune complex vasculitis
juvenile RA
systemic lupus erythematosus (SLE)
Immunology and Rheumatology