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Updated: Jun 1, 2026

Anteromesial Temporal Lobectomy for Medically Intractable Temporal Lobe Epilepsy: An Operative Study
Published on: August 15, 2025
Alternative surgical approaches in epilepsy
Paul R Gigante1, Robert R Goodman
1Department of Neurological Surgery, Columbia University, New York, NY 10032, USA. pg2223@columbia.edu
Abstract:
The mainstay of epilepsy surgery is the resection of a presumed seizure focus or disruption of seizure propagation pathways. These approaches cannot be applied to all patients with medically refractory epilepsy (MRE). Since 1997, vagus nerve stimulation has been a palliative adjunct to the care of MRE patients. Deep brain stimulation (DBS) in select locations has been reported to reduce seizure frequency in small studies over the past three decades. Recently published results from the SANTE (Stimulation of the Anterior Nuclei of Thalamus for Epilepsy) trial-the first large-scale, randomized, double-blind trial of bilateral anterior thalamus DBS for MRE-demonstrate a significant reduction in seizure frequency with programmed stimulation. Another surgical alternative is the RNS™ System (NeuroPace, Mountain View, CA), which uses a closed-loop system termed responsive neurostimulation to both detect apparent seizure onsets and deliver stimulation. Recently presented results from the RNS™ pivotal trial demonstrate a sustained reduction in seizure frequency with stimulation, although comprehensive trial results are pending.
Insights
New surgical options for medically refractory epilepsy (MRE) show promise. Responsive neurostimulation and anterior thalamus deep brain stimulation (DBS) significantly reduce seizure frequency in patients unresponsive to medication.
Area of Science:
- Neurosurgery
- Epileptology
- Neuromodulation
Background:
- Epilepsy surgery typically involves resecting seizure foci or disrupting propagation pathways.
- These traditional surgical methods are not suitable for all patients with medically refractory epilepsy (MRE).
- Vagus nerve stimulation has been used as a palliative treatment for MRE since 1997.
Purpose of the Study:
- To evaluate the efficacy of novel surgical interventions for medically refractory epilepsy.
- To present findings from large-scale trials of advanced neuromodulation techniques.
Main Methods:
- The SANTE trial investigated bilateral anterior thalamus deep brain stimulation (DBS) for MRE using a randomized, double-blind design.
- The RNS™ System pivotal trial assessed a closed-loop responsive neurostimulation system for MRE.
Main Results:
- The SANTE trial demonstrated a significant reduction in seizure frequency with programmed anterior thalamus DBS.
- The RNS™ System pivotal trial showed a sustained reduction in seizure frequency with responsive neurostimulation.
Conclusions:
- Advanced neuromodulation techniques, including anterior thalamus DBS and responsive neurostimulation, offer effective surgical alternatives for MRE.
- These interventions provide significant seizure reduction for patients with limited traditional surgical options.
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