Surgical therapy for medically intractable epilepsy

Area of Science:

• Neurosurgery
• Neurology
• Epileptology

Background:

• Renewed interest in surgical interventions for medically intractable epilepsies.
• Established surgical modalities include cortical resection and callosotomy.
• Accurate localization of epileptogenic zones is crucial for successful surgical outcomes.

Purpose of the Study:

• To review indications for cortical resection and callosotomy in epilepsy surgery.
• To compare various evaluation and intraoperative management approaches for temporal lobe epilepsy surgery.
• To discuss techniques for minimizing surgical morbidity and their contribution to understanding epilepsy neurobiology.

Main Methods:

• Review of existing literature on surgical epilepsy management.
• Comparison of selection criteria based on scalp EEG versus depth electrode recordings.
• Evaluation of intraoperative guidance techniques including electrocorticography and functional mapping.

Main Results:

• Electroencephalogram (EEG) remains the primary tool for identifying epileptogenic zones, despite advances in imaging like positron emission tomography.
• Multiple surgical approaches exist for temporal lobe epilepsy, with varying benefits and risks.
• No single surgical strategy is optimal for all patients; individualized approaches are necessary.

Conclusions:

• Surgical therapy for epilepsy offers viable options for intractable cases.
• The choice of surgical approach requires careful consideration of patient-specific factors and diagnostic modalities.
• Epilepsy surgery contributes significantly to understanding brain function and the neurobiology of epilepsy.