1 MCQs in Pathology for NEET PG
A 28-year-old Indian male presents with gross hematuria 36 hours after an upper respiratory infection. Serum creatinine is 0.9 mg/dL, and serum complement levels (C3, C4) are normal. Renal biopsy immunofluorescence shows dominant granular mesangial IgA deposits. The structure marked **B** in the diagram (C3 co-deposition in the mesangium) is present alongside the IgA. Which of the following best explains the pathophysiologic mechanism underlying the mesangial immune complex deposition in this patient?
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