Fig. 2From: A case of IgG4-related interstitial nephritis with ureteral obstruction: case report and literature reviewA HE staining. Numerous plasma cells are seen in the renal interstitium (× 200). B Masson staining. Renal interstitial mat striatum fibrosis (× 100). C Immunohistochemical staining. IgG4 renal interstitial focal cells were positive, with Several fields more significant than 25/HPF (× 400). D Immunohistochemical staining. IgG is positive for renal interstitial focal cells, IgG4/IgG = 35% (× 400)Back to article page