A Case of Chemotherapy-Refractory “THRLBCL like Transformation of NLPHL” Successfully Treated with Lenalidomide

Figure 2

(a) CD21 stain highlights rare dendritic meshworks shown at 200x magnification. (b) The large tumor cells are strongly positive for CD45 (this is essential in excluding classical Hodgkin lymphoma from the differential diagnosis; both NLPHL and THRLBCL will be CD45+) shown at 400x magnification. (c) CD163 stain highlights abundant background histiocytes shown at 40x magnification. (d) Large tumor cell nuclei are strongly OCT2 positive. Note the presence of tumor cells in the center shown at 100x magnification.

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