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Figure 1: Serial brain MRI scans of the patient. First MRI of brain on presentation showed gadolinium-enhancing lesions (a and b) and a T2 hyperintense lesions with perilesional hypontense rim (c). Second MRI of brain obtained prior to initiation of plasmapheresis showed minimal enlargement of the contrast-enhancing lesion (d)

Figure 1: Serial brain MRI scans of the patient. First MRI of brain on presentation showed gadolinium-enhancing lesions (a and b) and a T2 hyperintense lesions with perilesional hypontense rim (c). Second MRI of brain obtained prior to initiation of plasmapheresis showed minimal enlargement of the contrast-enhancing lesion (d)