RESUMEN
Hashimoto's encephalopathy (HE) is an uncommon syndrome and rare disease, associated with Hashimoto thyroiditis. It is characterized by a acute to chronic loss of cognitive dysfunction ,subacute onset of confusion with altered level of consciousness, stroke like episodes , neuropsychiatric manifestations ,seizures, and myoclonus. HE is believed to be an immune-mediated disorder rather than representing the direct effect of an altered thyroid state on the central nervous system. Hashimoto encephalopathy or Steroid-responsive encephalopathy associated with autoimmune thyroiditis (SREAT) and a more general term, nonvasculitic autoimmune meningoencephalitis, are also used to describe this condition. Here we are reporting 3 cases of hashimoto encephalopathy in the tertiary care centre who presented with acute to chronic memory loss , neuropsychiatric disturbances, complex parital seizures visual hallucinations and myoclonus and responded to steroids. A negative microbiological screen of the CSF and serum along with raised CSF protein, elevated serum antithyroid antibodies, characteristic EEG and neuroimaging findings yielded the diagnosis