Successful treatment of tubulointerstitial nephritis in immunoglobulin G4-related disease with rituximab: A case report

Figure 1 Positron-emission tomography-computed tomography scan reported as increased fluorodeoxyglucose uptake in infiltrative soft tissue areas in both kidneys (standardized uptake value max: 8. 01).

Figure 2 Histological section of kidney staining. A: In the examination of kidney biopsy specimen only one glomerulus and a few tubules were observed due to both intense inflammation and fibrosis (H and E: × 10); B: Histological section of kidney parenchyma showing interstitial nephritis characterized by the presence of inflammatory infiltration by lymphocytes and eosinophlis (H and E: × 40); C: Black arrows show the IgG4 staining positive cells in immunostaining with anti- IgG4 antibody (× 40).