Clinical Course and Features of Seizures Associated With LGI1-Antibody Encephalitis.

Chronic epilepsy occurred in 20.4% of our patients with LGI1-antibody encephalitis despite aggressive immunotherapy. Risk factors for chronic epilepsy were female sex and earlier age at onset. Relapses occurred in 40.8% of patients with prolonged follow-up, and long-term steroid-sparing immunotherapy was associated with a lower relapse rate.