Plasmablastic Lymphoma in an Immunocompetent Patient with MDS/MPN with Ring Sideroblasts and Thrombocytosis—A Case Report

Figure 1

(a) Large atypical lymphoid tumor cells with plasmacytoid morphology, abundant cytoplasm, and eccentric large nuclei with vesicular chromatin, some of which demonstrate nucleoli (H&E 40x). (b) Tumor cells were negative for CD20 antigen. Some positive reactive B lymphocytes can be discerned. Intense, uniform immunoreactivity for plasmacytoid differentiation-associated antigens CD138 (c) and MUM-1 (d). (e) EBER in situ hybridization was negative.

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