Fig. 2From: Recognizing IgG4-related tubulointerstitial nephritisIgG4-related membranous glomerulonephropathy. a Periodic acid-Schiff (PAS) stain of a case of clinically confirmed IgG4-related kidney disease (IgG4-RKD, same patient as in Fig. 1), showing a membranous pattern of glomerulonephropathy with occasional plasma cells in the mesangium. b IgG4 immunohistochemistry confirming several IgG4 expressing plasma cells in the glomerulus. c Electron microscopy demonstrating subepithelial electron dense deposits, consistent with membranous glomerulonephropathyBack to article page