Fig. 2
The histopathological and immunohistochemical findings of the renal specimen. (a) Periodic acid-silver metheramine staining showed mild injury in the glomeruli (amplification × 400). (b) Periodic acid-silver metheramine staining showed storiform fibrosis in the tubulointerstitial compartment (amplification × 200). (c) Haematoxylin and eosin staining showed massive lymphocytes and plasma cells infiltration in the tubulointerstitial compartment (amplification × 400). The black arrow indicated a plasma cell. (d) The immunohistochemistry staining showed IgG4-positive plasma cells infiltration in the interstitial compartment (amplification × 400). (e) Masson’s trichrome staining showed storiform fibrosis in the tubulointerstitial compartment (amplification × 200). (f) Masson’s trichrome staining showed massive inflammatory cells infiltration and fibrosis in the tubulointerstitial compartment (amplification × 100)