Table 1.

Diagnostic criteria for Hashimoto’s encephalopathy (From: Ref. 42)

All six criteria are needed for the diagnosis

1. Encephalopathy with seizures, myoclonus, hallucinations, or stroke-like episodes

2 Thyroid disease (Subclinical or mild overt usually hypothyroidism)

3. Brain MRI normal or with non-specific abnormalities

4. Presence of serum thyroid (thyroid peroxidase, thyroglobulin) antibodies

5. Absence of other neuronal antibodies in serum and CSF

6. Reasonable exclusion of alternative causes