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CT chest showing bilateral pleural effusions and clear lung parenchyma.
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Computed tomography of the chest and abdomen showed multiple calcified mediastinal lymphadenopathy and pleural effusions with atelectasis of the lung bases, but no obvious parenchymal lung lesions (Figure 1).
Lung biopsy shows hyaline amyloid deposits, predominantly in a perivascular pattern.
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Histopathology of biopsy of the right lung revealed pulmonary amyloidosis, mostly in a perivascular pattern, seen as hyaline deposits on Hematoxylin & Eosin stain (Figure 2).
Bone marrow biopsy shows abundant atypical plasma cells with immature nuclei
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A bone marrow biopsy revealed 25% plasma cells comprised predominantly of kappa-expressing cells (Figure 3).