Rare Presentation of Primary Extramedullary Plasmacytoma as Lip Lesion

Figure 1

(a) Dense plasma cell infiltrate, H&E, 40x; (b) CD138 immunostain labeling plasma cells, IHC 40x; (c) Kappa in situ hybridization with only rare plasma cell labeling, ISH, 40x; (d) Lambda in situ hybridization with most plasma cells labeling, ISH, 40x.