<prompt> A child presented with cola coloured urine, proteinuria 2 ho rash 2 weeks ago. Probable Dx isIgA nephropathyHSPHUSWegener Granulomatosis  <response>: This patient has developed hematuria cola coloured urine 2 weeks after an upper respiratory tract infection there is history of rash and most of the URTIs have rash in their clinical course e.g. measles, chicken pox etc.Hematuria after URTI:After 2 days IgA nephropathyAfter 10 days - 2 weeks HSP, PSGN. 