Multicenter and Prospective Clinical Registry Study of Autoimmune Encephalitis in China

Inclusion Criteria:

1. Older than 6 months.
2. Encephalopathy symptoms (change of mental state and consciousness level) persist for more than 24 hours;
3. At least one or more clinical features of the followings: fever, epilepsy, focal neurological deficiency symptoms, changes in CSF(cerebrospinal fluid inflammatory), changes in EEG (electroencephalogram), radiographic abnormalities;
4. Clinical suspected encephalitis, but conventional detected methods cannot make etiology clear.
5. Signed the informed consent.

Exclusion Criteria:

1. Infants less than 6 months;
2. The metabolic encephalopathy;
3. Infectious encephalitis with clear pathogen clinically, referring the specific pathogenic microorganisms, including: bacteria, virus, fungus, parasite, spirochete and so on;
4. Non-infectious encephalitis with clear diagnosis clinically, including: multiple sclerosis, neuromyelitis optic, acute disseminated encephalomyelitis and so on.