Fig. 1

Pathlogical findings of the first renal biopsy. a Frozen tissue on IF showed granular IgG deposition along the capillary wall and in the mesangial area. (× 200). b IF showed granular C3 deposition along the capillary wall and in the mesangial area. (× 200). c IF showed granular C4d deposition along the capillary wall and in the mesangial area. (× 200). d IF showed granular κ light chain deposition along the capillary wall and in the mesangial area. (× 200). e IF showed granular λ light chain deposition along the capillary wall and in the mesangial area. (× 200). f IF showed granular IgG3 deposition along the capillary wall and in the mesangial area. (× 200). g Light microscopy showed a glomerular MPGN pattern. (periodic acid-Schiff staining, ×400). h Electron microscopy showed the electron-dense deposits in the mesangial, subendothelial and subepithelial areas of glomeruli. (× 8000)