<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 TgABasement membrane thickening  <response>: Ans. is c i.e., Mesangial deposits of IgA o This child has -- i Rash ii Ahritis swelling of knee joint iii Haematuria o All these suggest the diagnosis of Henoch Schonlein purpura o HSP is characterized by deposition of IgA in the mesangium. 