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![Light chain (AL) amyloidosis following gastrointestinal symptoms that involve multiple organs: a case report](https://image.oaes.cc/b7c3de55-9667-493b-8586-d7f4df92428e/rdodj3045.fig.4.jpg)
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.