Hashimoto's Disease (Hashimoto's Thyroiditis) is an autoimmune thyroiditis (AIT) that is a common cause of hypothyroidism.
Hashimoto's Encephalopathy (HE) (also known as Steroid Responsive Encephalopathy Associated with Autoimmune Thyroiditis [SREAT]), is a rare, clinically heterogeneous autoimmune encephalitis that is associated with Hashimoto's disease and positive thyroid autoantibodies.