Fig. 3

a Light microscopy: a glomerulus with segmental fibrin in glomerular tufts, and segmental cellular crescents (four out of 20 glomeruli showed same features). b Light microscopy: one glomerulus with global sclerosis. c Light microscopy: occasional marginating neutrophils in the remaining glomeruli. d Light microscopy: focal mild tubular injury with tubular cell vacuolization, apical blebbing, focal dilation, with some proteinaceous casts and sparse red blood cells casts. The interstitium has mild focal inflammatory infiltrate. There is mild tubular atrophy and interstitial fibrosis. e Immunofluorescence: segmental granular glomerular staining for immunoglobulin 2, C3, and trace stain for kappa and lambda. f Electron microscopy: a glomerulus with a cellular crescents and some fibrin