<prompt> Frequency of renal involvement in Henoch Schonlein purpura is?1-55-1010-5050-70  <response>: c. 10-50Ref: Nelsons 20e p 1216-1217, Ghai 8e p 632-633Renal involvement in HSP:It occurs in up to 50 of children with HSPManifests as microscopic hematuria, proteinuria, hypertension, frank nephritis, nephrotic syndrome, and acute or chronic renal failure; Progression to end-stage renal disease is uncommon in children 1-2 