A 8-year-old male had non-blanching rashes over the shin and swelling of the knee joint with haematuria +++ and protein +. Microscopic analysis of his renal biopsy specimen is most likely to show –

This child has → i) Rash              ii) Arthritis (swelling of knee joint)                        iii) Haematuria All these suggest the diagnosis of Henoch Schonlein purpura HSP is characterized by deposition of IgA in the mesangium.