Fig. 2
From: Warthin tumor concomitant with mantle cell lymphoma: a case report and review of literature
(A) CK stain highlights the epithelial component in WT (100×). CK = Cytokeratin. (B) CD20 stain is weakly positive in stromal lymphocytes (100×). (C-G) CD43 stain, Pax5 stain, Cyclin D1 stain, SOX11stain, and Mum1 stain show positive expression of each antigen in stromal lymphocytes (100×). (H) Ki-67 proliferation index is about 70% within stromal lymphocytes (100×)