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Updated: Jul 16, 2026
Network Analysis of Foramen Ovale Electrode Recordings in Drug-resistant Temporal Lobe Epilepsy Patients
Published on: December 18, 2016
A randomized, controlled trial of surgery for temporal-lobe epilepsy
S Wiebe1, W T Blume, J P Girvin
1Department of Clinical Neurological Sciences, University of Western Ontario, and London Health Sciences Centre, Canada. swiebe@uwo.ca
Background:
Randomized trials of surgery for epilepsy have not been conducted, because of the difficulties involved in designing and implementing feasible studies. The lack of data supporting the therapeutic usefulness of surgery precludes making strong recommendations for patients with epilepsy. We conducted a randomized, controlled trial to assess the efficacy and safety of surgery for temporal-lobe epilepsy.
Methods:
Eighty patients with temporal-lobe epilepsy were randomly assigned to surgery (40 patients) or treatment with antiepileptic drugs for one year (40 patients). Optimal medical therapy and primary outcomes were assessed by epileptologists who were unaware of the patients' treatment assignments. The primary outcome was freedom from seizures that impair awareness of self and surroundings. Secondary outcomes were the frequency and severity of seizures, the quality of life, disability, and death.
Results:
At one year, the cumulative proportion of patients who were free of seizures impairing awareness was 58 percent in the surgical group and 8 percent in the medical group (P<0.001). The patients in the surgical group had fewer seizures impairing awareness and a significantly better quality of life (P<0.001 for both comparisons) than the patients in the medical group. Four patients (10 percent) had adverse effects of surgery. One patient in the medical group died.
Conclusions:
In temporal-lobe epilepsy, surgery is superior to prolonged medical therapy. Randomized trials of surgery for epilepsy are feasible and appear to yield precise estimates of treatment effects.
Insights
Epilepsy surgery significantly improves seizure freedom and quality of life compared to antiepileptic drugs in temporal-lobe epilepsy patients. This randomized trial demonstrates surgery
Area of Science:
- Neurology
- Neurosurgery
- Clinical Trials
Background:
- Randomized trials for epilepsy surgery are challenging but crucial.
- Lack of evidence hinders strong recommendations for surgical interventions.
- This study addresses the need for efficacy and safety data on epilepsy surgery.
Purpose of the Study:
- To assess the efficacy and safety of surgery for temporal-lobe epilepsy.
- To compare surgical outcomes with prolonged antiepileptic drug therapy.
- To evaluate the feasibility of conducting randomized trials for epilepsy surgery.
Main Methods:
- A randomized controlled trial involving 80 patients with temporal-lobe epilepsy.
- Patients were assigned to either surgery (40) or antiepileptic drug treatment (40) for one year.
- Primary outcome: freedom from seizures impairing awareness; secondary outcomes: seizure frequency, quality of life, disability, and mortality.
Main Results:
- 58% of surgical patients were seizure-free versus 8% in the medical group (P<0.001).
- Surgery led to significantly fewer impairing seizures and improved quality of life (P<0.001).
- Adverse effects occurred in 10% of surgical patients; one medical patient died.
Conclusions:
- Surgery is demonstrably superior to prolonged medical therapy for temporal-lobe epilepsy.
- Randomized trials for epilepsy surgery are feasible and provide reliable treatment effect estimates.
- Findings support surgical intervention for select epilepsy patients.
