Journal
AMERICAN JOURNAL OF NEURORADIOLOGY
Volume 29, Issue 8, Pages 1550-1551Publisher
AMER SOC NEURORADIOLOGY
DOI: 10.3174/ajnr.A1113
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Steroid-responsive encephalopathy associated with autoimmune thyroiditis (SREAT) presents with focal or diffuse nonenhancing MR imaging abnormalities in 50% of patients with SREAT during subacute exacerbation. Vasculitic changes in biopsy studies as well as the elevation of antithyroid antibodies and CSF protein suggests an inflammatory cause. We report the case of a patient with SREAT with changes on diffusion-weighted MR imaging, which improved with corticosteroid therapy and plasmapheresis, supporting the theory of inflammatory changes in exacerbation of presumptive SREAT.
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