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(a) The proximal tubular basement membranes exhibit diffuse “smudgy” immunofluorescence staining for IgG. (b) A few glomeruli showed segmental granular capillary wall immunofluorescence staining for IgG. (c) Conspicuous electron-dense deposits were present in the proximal tubular basement membranes by electron microscopy. (d) Segmental subepithelial electron-dense deposits with intervening glomerular basement membrane “spikes” were present by electron microscopy.
