Hashimoto's encephalopathy: Follow‐up data from neuropsychology, lumbar puncture, and FDG‐PET

: Hashimoto's encephalopathy is a rare disease with nonspecific symptoms, associated with elevated levels of anti-TPO and/or anti-TG. It can be potentially fatal. However, it is responsive to steroid and treated in due time, it can be fully reversible.