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Washington University Experience | NEOPLASMS (HEMATOLYMPHOID) | Lymphoma, primary | 4B Lymphoma (Case 4) H&E 2

Sections of the "corpus callosum, lesion," show a perivascular and parenchymal infiltrate of atypical lymphocytes, composed of large cells with slightly irregular nuclei, moderately clumped chromatin and large nucleoli, in a background of abundant necrosis. The mitotic rate is brisk and there is increased apoptosis.

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