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What is 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? and explain in detail?
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)