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. 2015 May 8;7(7):575–581. doi: 10.14740/jocmr2189w

Figure 1.

Figure 1

Light microscopy (A, B) shows: (A) mildly thickened glomerular basement membrane and (B) diffuse acute tubular injury with epithelial simplification consistent with acute tubular necrosis (ATN). Immunoperoxidase staining (C, D): immunostaining for IgG4 shows IgG4 positive plasma cells in the interstitium.