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Figure 2 :Surgical pathology specimen from right temporoparietal lobe biopsy. (a) A low-power magnification hypercellular, gliotic tissue. (b) An inflammatory infiltrate is seen in a perivascular distribution (c, d) Lymphocytes can be seen focally penetrating the walls of small blood vessels consistent with a vasculitis. Lymphoma is unlikely given the chronic symptoms in this case as well as evidence of mixed T and B cell lineage on immunohistochemical staining. No malignant cells or infections were seen

Figure 2 :Surgical pathology specimen from right temporoparietal lobe biopsy. (a) A low-power magnification hypercellular, gliotic tissue. (b) An inflammatory infiltrate is seen in a perivascular distribution (c, d) Lymphocytes can be seen focally penetrating the walls of small blood vessels consistent with a vasculitis. Lymphoma is unlikely given the chronic symptoms in this case as well as evidence of mixed T and B cell lineage on immunohistochemical staining. No malignant cells or infections were seen