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Light microscopy findings of kidney biopsy. a Necrotizing glomerulonephritis with moderate interstitial inflammation (Periodic acid–Schiff stain, original magnification × 100). b Glomerular basement membrane breaks and fibrin deposition (Masson stain, original magnification × 400). c The collapse of the glomerular tuft and disruption of Bowman capsule (periodic acid-methenamine-silver original magnification × 400)
