Snapshot A 5-year-old boy presents to the emergency room for abdominal pain and rash on his legs. He also reports having intermittent joint pains. A few weeks ago, he had an upper respiratory infection. On physical exam, he has nontender palpable purpura on his buttocks and lower extremities. His abdomen is mildly tender. Urine studies show proteinuria and hematuria. (Henoch-Schonlein purpura/IgA vasculitis) Introduction Clinical definition login to view 1 more bullet Pathogenesis login to view 3 more bullets General clinical features login to view 3 more bullets Studies login to view 3 more bullets Cryoglobulinemic Vasculitis Clinical definition login to view 3 more bullets Presentation login to view 9 more bullets Studies login to view 4 more bullets Treatment login to view 2 more bullets Henoch-Schonlein purpura (IgA Vasculitis) Clinical definition login to view 3 more bullets Presentation login to view 8 more bullets Studies login to view 8 more bullets Treatment login to view 4 more bullets