PMC3112510_01
Bone marrow biopsy: Infiltration by lymphoplasmacytic B-NHL. Hematoxylin-eosin staining (a). Immunohistochemical staining for anti-CD20 (b) and anti-CD 138 (c).
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fig1
Serum protein electrophoresis and subsequent immunofixation revealed a monoclonal IgM light chain while bone marrow biopsy in combination with immmunohistochemical studies established the diagnosis of lymphoplasmacytic B-NHL (Figure 1).