Fig. 1(A) A bone marrow biopsy showed hypercellular marrow (>90%) with numerous eosinophils and plasma cells (H&E staining,×1,000). (B) Bone marrow aspiration revealed hypercellular marrow with many eosinophils and plasma cells (Wright staining,×1,000).
Fig. 2(A) A right pleural effusion was noted, with focal consolidation or subsegmental atelectasis of the right middle lobe. (B, C) Hepatosplenomegaly of both hepatic lobes was present without a definite focal lesion. The perihepatic space contained fluid. The lymph nodes were enlarged in the peripancreatic, mesenteric and aortocaval areas. (D) Minimal pericardial effusion, septal hypertrophy and mild global hypokinesia of the left ventricle were noted on echocardiography. (E) There was a relaxation abnormality in the mitral valve inflow pattern. (F) Diffuse-fashioned erythema of the mucosa was noted in the antrum of the stomach.
Fig. 3(A) The liver parenchyme showed infiltrations of numerous eosinophils and plasma cells on the hemorrhage focus (H&E staining,×200). (B) The liver parenchyme and portal areas showed infiltration of eosinophils and plasma cells on the hemorrhage foci (H&E staining,×400). (C, D) Plasma cells and eosinophils were observed in the pleural fluid and the ascitic fluid (D) (H&E staining, C,×1,000; D,×1,000).
Fig. 4Flow cytometric detection of plasma cells. Identification of plasma cells in pleural and peritoneal fluids of the patient using the plasma cell markers CD38 and CD138. These cells are high-intensity CD38-positive and CD138-positive. (A) Plasma cell markers were positive (CD138, 60.12%; CD38, 96.2%) in the peritoneal fluid. (B) Plasma cell markers were positive (CD138, 96.18%; CD38, 99.8%) in the pleural fluid.
Fig. 5(A) A monoclonal peak is observed in the gammaglobulin fraction (7.73 g/dL) in serum protein electrophoresis. (B) IgG (G), kappa (κ), and lambda (λ) lanes were identified in serum immunofixation electrophoresis. SP, standard protein; A, IgA; M, IgM.