PMC8498661_01
A) renal biopsy, Masson's trichrome (x200), circumferential cellular crescent; B) renal biopsy, Masson's trichrome (x200), capillary fibrinoid necrosis; C) renal biopsy, immunofluorescence (x200); linear anti-IgG antibody staining along the GBM; D) computed tomography showed diffuse alveolar hemorrhage
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F1
Renal pathology of 25 glomerulus found large cellular crescents in 17 glomeruli: circumferential in 11 glomeruli and circumscribed in 7 glomeruli, without rupture of Bowman s membrane (Figure 1).