Figure 2.

(A) Optical micrograph of the renal biopsy specimen showing a diffusely and globally thickened glomerular basement membrane with subepithelial spikes and double contours (periodic acid-stiff stain, × 400). (B) Immunofluorescence of fine granular deposition of immunoglobulin G along the peripheral capillary wall. (C) Electron microscopy showed that the glomerular basement membrane is diffusely thick with relatively evenly-spaced intramembranous electron dense deposits. The glomerular epithelial foot processes are diffusely effaced.