609795.fig.002a
(a)
609795.fig.002b
(b)
609795.fig.002c
(c)
609795.fig.002d
(d)
Figure 2: IgG4-related tubulointerstitial nephritis with Henoch-Schönlein purpura nephritis. (a) Periodic acid-Schiff (PAS) staining reveals severe tubulointerstitial nephritis (PAS 100). (b) Global endocapillary proliferation is evident (PAS 400). (c) Immunofluorescence staining for C3 reveals mesangial and capillary wall deposits ( 400). (d) Many IgG4+ plasma cells are seen in the interstitium (IgG4 400).