Hashimoto's Encephalopathy Presented with Nonspecific Vasogenic Edema in Brain Magnetic Resonance Imaging

Hashimoto's encephalopathy (HE) is a rare autoimmune disorder characterized by a nonspecific encephalopathy with high titers of serum anti-thyroid antibody in the absence of other defined causes. A 54-year-old woman was admitted due to recurrent seizures and confusion. Her serum anti-thyroid antibody level was elevated, and brain MRI showed multiple instances of vasogenic edema. Her symptoms disappeared after treatment with high-dose steroids and antiepileptic drugs. We propose that HE should be considered in the differential diagnosis of multiple vasogenic edema on brain imaging.