Figure 2From: A case of IgG4-related tubulointerstitial nephritis concurrent with Henoch-Schönlein purpura nephritisRepresentative images of the renal biopsy samples. A. Mild mesangial proliferation is observed. (PAS ×200) B. Obvious inflammatory cell infiltration including lymphocytes, plasma cells and eosinophils are found in the interstitium. (PAS ×200) C. Massive fibrosis and inflammatory cell infiltration are observed in the interstitium. (Masson Trichrome staining ×200) D. Immunofluorescence photomicrographs showing IgA (×400). E. Immunostaining reveals abundant IgG4-positive plasma cells in the interstitium. F. Electron micrograph shows numerous electron-dense deposits in the mesangium. ×3,000.Back to article page