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Figure 1. Prebiopsy and postbiopsy MRI

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1 Figure 1. Prebiopsy and postbiopsy MRI
Prebiopsy and postbiopsy MRI (A) Immediately prebiopsy, axial brain MRI shows a non–contrast enhancing T1 hyperintensity in the right basal ganglia juxtaposed to the external capsule (arrows) with modest mass effect; these changes were not evident in a prior MRI study. Corresponding fluid-attenuated inversion recovery (FLAIR) and diffusion-weighted imaging (DWI) sequences were essentially unremarkable. (B) Postbiopsy axial brain MRI reveals resolution of the right basal ganglia T1 hyperintensity (arrow), with biopsy artefact (arrow head), with corresponding FLAIR images remaining otherwise unremarkable aside from ongoing modest mass effect (arrow), while the DWI series displays subtle cerebral cortical signal increase in the posterior cingulate gyri (right more than left) and right posterior temporal region (arrow). Boaz Kim et al. Neurol Neuroimmunol Neuroinflamm 2016;3:e248 © 2016 American Academy of Neurology

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