Strong immunostaining with the plasma cell markers CD138/syndecan1 and MUM1/IRF4 in plasmablastic lymphoma. Images were taken using a Nikon Eclipse 80i microscope (Nikon, Tokyo, Japan) with a pan fluor 40×/0.75 objective and Nikon digital sight DS-Fi1 camera equipped with control unit-DS-L2 (Nikon). Images were assembled using Adobe Photoshop 6 (Adobe Systems).