Figure 2: Cases of MALT thyroid lymphoma: (a) Monocytoid and plasmacytoid lymphocytes (arrows). (H and E stain X400). (b) LELs (H and E stain x400). (c) CD20-positive tumor cells (Immunoperoxidase stain; x400). (d) CD3-negative tumor cells (Immunoperoxidase stain; x400). (e) Residual thyroid follicles (arrow). (CD20 immunohistochemistry; x400). (f) Destructive LELs by CD20-positive tumor cells with MALT ball (arrow) (Immunoperoxidase stain; x400). (g) Few residual thyroid follicles stained by anti cytokeratin; note the LEL (arrow) (Immunoperoxidase stain; x400)