As my husband has very rapidly deteriorated. I done some research of my own. I came across this. In the diagnoisis of rapidly progessive dementia, Hashimoto's Encephalitis should be considered as an important differential diagnoisis. In cases of dementia, myoclonus,epileptic seizures and other neurological symptoms, the thyroid autoantibodies should be determined. Does anyone know about this? The most common symptoms are myoclonus, epileptic seizures, dementia, and disturbances of consciousness. Perhaps i'm cluching at straws. but how many have been tested for it with these symptoms? or have been just diagnoised as having Dementia. Maybe it's worth finding out about.