Long-term Seizure Outcomes of Epilepsy Surgery in Temporal Lobe Epilepsy Patients

Strategic Insights -

New research has shed light on the effectiveness of anterior temporal lobectomy (ATL) in treating patients with drug-resistant epilepsy caused by mesial temporal lobe epilepsy with hippocampal sclerosis (MTLE-HS). The study, conducted by a team of researchers at the National University of Misiones (UNAM) in Mexico City, found that patients who underwent ATL guided by non-ictal video-electroencephalogram (video-EEG) with concordant clinical and MRI findings had seizure freedom outcomes comparable to those obtained with ictal video-EEG. The research, published in Epilepsy & Behavior, also suggests that non-ictal evaluations in resource-limited settings may be a viable alternative to ictal video-EEG.

Key Takeaways:

  • The study included 122 patients with MTLE-HS who underwent ATL, with 73 (59.8%) evaluated using preoperative ictal video-EEG and 49 (40.2%) using non-ictal video-EEG.
  • MRI concordance was observed in 62 (84.9%) of the ictal group and 41 (83.7%) of the non-ictal group.
  • Overall, 78 patients (63.9%) were seizure-free, with 47 (64.4%) in the ictal group and 31 (63.3%) in the non-ictal group.
  • No significant difference in seizure freedom was observed between groups over a 10-year follow-up (log-rank p = 0.24).
  • The study's findings support the use of non-ictal evaluations in resource-limited settings, which may improve accessibility and treatment outcomes for patients with MTLE-HS.

Statistics:

  • 33.9% of patients with MTLE-HS were seizure-free without ictal video-EEG (p = 0.24)
  • 63.9% of patients with MTLE-HS were seizure-free after ATL (63.3% ictal and 64.4% non-ictal)
  • 84.9% of patients in the ictal group had MRI concordance
  • 83.7% of patients in the non-ictal group had MRI concordance
  • The study evaluated a cohort of 122 patients with MTLE-HS over a 10-year follow-up

Sources:

  • NewsRx. New Temporal Lobe Epilepsy Data Have Been Reported by Researchers at National University of Misiones (UNAM) (Long-term seizure outcomes of epilepsy surgery in patients with mesial temporal lobe epilepsy caused by hippocampal sclerosis based on ...). Health & Medicine Week. October 24, 2025; p 1197.
  • Epilepsy & Behavior, 2025;172:110714.
  • Academic Press Inc Elsevier Science, 525 B St, Ste 1900, San Diego, CA 92101-4495, USA.