Figure 3From: Membranoproliferative glomerulonephritis presenting as arthropathy and cardiac valvulopathy in hypocomplementemic urticarial vasculitis: a case report Findings of kidney biopsy. (A) The mesangium was expanded due to increased matrix without hypercellularity. The glomerular capillary walls were mildly thickened. Peridic acid-Schiff (PAS) stain; original magnification Ă—400. (B) Electron microscopy shows irregular electron dense deposits in the subendothelial and paramesangial space.Back to article page