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Figure 1: Kidney biopsy showing a diffuse infiltrate of atypical plasma cells mainly at the tubulointerstitial compartment (hematoxylin- eosin stain, original magnification × 400 , a) and λ light chains (b)

Figure 1: Kidney biopsy showing a diffuse infiltrate of atypical plasma cells mainly at the tubulointerstitial compartment (hematoxylin- eosin stain, original magnification × 400 , a) and λ light chains (b)