Fig. 2
From: A novel case of renal pathergy reaction in a Behçet’s disease patient complicated by IgA vasculitis
Immunofluorescence staining and electron microscopy of the renal biopsy. a Immunofluorescence staining for IgA and C3 showed negative staining in the glomeruli (original magnification, ×600). b Electron microscopy revealed small electron-dense deposits (arrows) under the basement membrane. In addition, diffuse thickening of glomerular basement membrane (GBM), which is known as an early ultrastructural characterization of diabetic nephropathy, was not detected (sites of GBM not affected pointed in arrowheads) (original magnification, ×4000)