Figure 1. (A) Detection of monoclonal proteins on beta-globulin area (arrow) in urine protein electrophoresis and paraprotein bands on gamma-globulin area (closed arrow) in serum protein electrophoresis. (B) The tomography image of subcarinal lympadenopathy (arrow). (C) Endosonography-guided sampling of lympadenopathy( arrow). (D) Clonal expansion of plasma cells (arrow).