PMC5768544_01
Heterogeneous attenuation (about 6.2 x 6.3 cm in size, white arrow) with mural nodules in the spleen.
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However, a follow-up computed tomography (CT) of the abdomen showed a heterogeneous attenuation (about 6.2 x 6.3 cm) in size with mural nodules in the spleen (Fig. 1).
(A) Distinctive plasma cells surrounding the amyloid-like deposition (H&E, x400). (B) Positive thiof lavin S staining (x400) under high-background fluorescence.
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Microscopic examination revealed many plasma cells surrounding the amyloid-like deposition (Fig. 2A) as well as polyclonality of kappa and lambda light chains. S positive under high-background fluorescence (Fig. 2B). Serum immunoelectrophoresis revealed monoclonal proliferation of immunoglobulins (IgG, 1,670 mg/dL).