Nonsecretory Multiple Myeloma and AL Amyloidosis Presenting with Nephrotic Range Proteinuria

Figure 1

(a) Homogenous pale eosinophilic material accumulation in the glomerulus and in the hilar arteriole (H&E, 400). (b) Positive Congo red staining in the areas of glomerular deposition (Congo red stain, 400). Inset shows apple green birefringence given by deposits under polarized light (Congo red stain with polarized microscopy, 200). (c) Amyloid was strongly reactive for lambda light chain on immunofluorescence microscopy (immunofluorescence, fluorescein isothiocyanate-conjugated anti-lambda antibody, 400).

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(b)

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