<prompt> A 8 year old male had non blanching rashes over the shin and swelling of knee joint with haematuria and protein . Microscopic analysis of his renal biopsy specimen is most likely to show?Tubular necrosisVisceral podocyte fusionMesangial deposits of IgABasement membrane thickening  <response>: Answer is C Mesangial deposits of IgA: Presence of non blanching rash Purpura, swelling of knee Ahralgia along with haematuria glomerulonephritis suggests the diagnosis of Henoch- Schonlein purpura. H.S purpura is characterized by deposition of IgA in the mesangial region Robbins 