Avacopan in the treatment of relapsing polychondritis with myeloperoxidase-antineutrophil cytoplasmic antibody associated vasculitis: A case report

Figure 1  Renal biopsy stained using periodic acid Schiff shows necrotizing and crescentic glomerulonephritis affecting more than 50% of the glomeruli revealing rapidly progressive glomerulonephritis.

Figure 2 Immunofluorescence staining. A: Immunofluorescence staining of renal biopsy showed no immune deposits for IgG; B: Immunofluorescence staining of renal biopsy showed no immune deposits for IgA.

Figure 3 Hematoxylin and eosin stain. A: Renal Biopsy with hematoxylin and eosin stain, revealing glomeruli with fragments of necrotic nuclear contents due to karyorrhexis; B: Renal Biopsy with hematoxylin and eosin stain at higher magnification, revealing glomeruli with fragments of necrotic nuclear contents due to karyorrhexis.