fig4

Figure 4. Pathology and immunohistochemistry. (A-B) the mesangial area of the glomerulus is enlarged and the nodular changes are seen with HE staining (× 400); (C-D) A: Light chain lambda and kappa deposits in glomeruli and arteriole (× 400); (E) Polarized light microscopy shows apple green refracting in glomeruli positive for Congo red staining (× 400); (F) Electron microscopy shows slender, disordered amyloid fibril deposition.