Pediatrics New Born Infants 1ba43b84 Most common vasculitis in children: A Kawasaki disease B Takayasu disease C HSP D Microscopic PAN High-Yield Explanation c. HSP(Ref: Nelson's 20/e p 1216-1217, Ghai 8/e p 632-633)Henoch-Schonlein purpura (HSP) is the most common vasculitis of childhood.