ArticleEpilepsy & behavior reports2026
The electroclinical phenotype of epilepsy following autoimmune encephalitis.
Article in Epilepsy & behavior reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objective: To describe the temporal and spatial dynamics of electroencephalographic (EEG) recordings in epilepsy following autoimmune encephalitis (AE) compared to temporal lobe epilepsy (TLE) without signs of inflammatory etiology. Methods: We assessed electroencephalographic properties using continuous long-term (72-h) EEG recordings in combination with neuroimaging markers and cerebrospinal fluid (CSF) parameters of 25 patients with epilepsy following AE and 30 patients with TLE. We specifically investigated the presence of focal slowing (FS) and epileptiform discharges (EDs). Additionally, spectral EEG variability during wakefulness and sleep was analyzed using quantitative EEG analysis. Results: Compared to TLE, patients with AE showed significantly more independent bitemporal FS and independent bitemporal EDs ( Significance: These results demonstrate distinct and quantifiable EEG characteristics in epilepsy following AE. The identified EEG patterns and the proposed score may serve as biomarkers for differentiating between epilepsy following AE and TLE of non-inflammatory etiology. This approach can aid clinicians in determining the need for further diagnostic testing or optimizing therapy decisions in the post-acute phase, where clinicians frequently encounter patients with new-onset or evolving epilepsy in whom a current or prior inflammatory etiology is suspected. In this scenario, a precise understanding of post-acute EEG characteristics may be clinically relevant to assess the probability of an underlying autoimmune/inflammatory process and to guide the immune-directed evaluation, antiseizure medication optimization, and epilepsy-surgical evaluation.
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