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Immunohistochemical (Streptavidin-Biotin) and EBV detection (In situ Hybridization) in BL of the jaws. A) CD45 membrane staining (400X). B) Diffuse CD20 membrane staining (400X). C) CD10 positive membrane staining (400X). D) Bcl6 nuclear positivity (400X). E) High proliferative index measured by Ki67 nuclear staining (200X). F) EBV proved to be positive in all cases investigated (EBER; 200X).
