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Significant necrosis with perivascular mixed inflammatory cells, with lymphocyte predominance and concentric vascular wall fibroblastic proliferation. Rare individual Toxoplasma gondii bradyzoites and numerous tachyzoites were identified (100X) ( A). Immunophenotyping of the inflammatory cells, showing a mixture of mature T- and B-lymphocytes with CD8+ over CD4+ cell predominance. There was no evidence of other infections or CNS lymphoma (100X) ( B).
