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FIG 1. Primary brain lymphoma.
A, Coronal T1-weighted image with contrast shows ring-enhancing mass lesion in right temporal lobe with surrounding edema changes.
B, Coronal thallium-201 SPECT shows focal uptake in right temporal region with thallium index of 4.8, which is consistent with malignancy and was confirmed by brain biopsy to represent primary brain lymphoma.
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