Fig. 2

Representative light microscopic findings of renal biopsy at first diagnosis. a. Marked “storiform” fibrosis was seen in the interstitium. The glomeruli showed ischemic sclerosis (Masson trichrome-methenamine silver, × 200). b. Ectopic germinal center-like structure was formed in the interstitium (HE, × 200). c. Russell body and a few “diamond” or “rectangle” crytals can be seen in some plasma cells (HE, × 400). d. Electron dense deposits were detected along tubular basement membrane (TBM) (× 6000)