PMC7380343_01
PMC7380343_02
Light microscopy findings. (A) Periodic acid-Schiff (PAS) stain shows normal glomeruli. (B) Hematoxylin and eosin stain, (C) PAS stain, and (D) Masson trichrome stain each show cellular crescents (arrows) and endocapillary proliferation.
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fig1
On immunofluorescence, there was bright glomerular C3 staining and negative staining for immunoglobulin A (IgA), IgG, IgM, C1q, and kappa and lambda light chains (Fig 1).
(Upper panel) Immunofluorescence shows bright staining for C3 in the mesangium and capillary wall. (Lower panel) Electron microscopy findings show intramembranous, subendothelial, and mesangial electron-dense deposits.
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fig2
On electron microscopy there were mesangial, intramembranous, and subendothelial deposits with absence of subepithelial humps (Fig 2).
PMC7380343_03
PMC7380343_04