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Histopathology of perisplenic tissues. (a) Tumoral intravascular infiltration (arrows) (H&E, 10x). (b) Large hyperchromatic cell inside small vessels around splenic lymph nodes (H&E, 40x). (c) Strong positive CD20 B-cell surface expression. (d) Positive expression of MUM1. (e) Positive expression of PAX5.
