Abbreviation:<unk> 
Classical triad of non-thrombocytopenic palpable<unk> , abdominal pain, arthritis
Most common vasculitis in childhood (usually 2-11 yr)
More common in white/asian males
Small vessel
IgA mediated
5% of cases associated with intussusception (abdominal vasculitis)
Most cases preceded by a URI
95% recover completely after 3-4wk
Progression to renal insufficiency is feared complication (5-15% in children)
Presentation in adults is often worse, with persisting renal insufficiency in 30-50%
Adults may require more aggressive treatment with steroids +/- cyclophosphamide though evidence of benefit is lacking
More common in white/asian males
Small vessel
IgA mediated
5% of cases associated with intussusception (abdominal vasculitis)
Most cases preceded by a URI
95% recover completely after 3-4wk
Presentation in adults is often worse, with persisting renal insufficiency in 30-50%
Adults may require more aggressive treatment with steroids +/- cyclophosphamide though evidence of benefit is lacking
Henoch-Schonlein purpura
Emergent
Serum sickness
Necrotizing Enterocolitis
Kawasaki disease
Volvulus
Hemolytic uremic syndrome
Testicular torsion