Leucine-rich glioma-inactivated 1 antibody (LGI1-Ab) autoimmune encephalitis commonly affects older men and typically presents as a limbic encephalitis with predominant memory and behavioral disturbances, accompanied by sleep disorders, temporal lobe seizures, and, in nearly 30% of the patients, pathognomonic faciobrachial dystonic seizures (FBDS).1,2 Although most patients experience a monophasic course followed by a slow recovery with frequent (mainly cognitive) sequelae, relapses have been reported in approximately 15%–25% of patients.3, -, 8. This evidence concerns the gene LGI1 and sleep disorder.