Pediatric Epilepsy Surgery: The Noninvasive Presurgical Evaluation

Area of Science:

• Neurology
• Neurosurgery
• Epileptology

Background:

• Drug-resistant epilepsy affects diverse populations, necessitating neurosurgical interventions like resection or device implantation.
• Presurgical evaluation is vital for identifying targets and planning epilepsy surgery.
• Evolving techniques continuously refine the scope of presurgical assessments.

Purpose of the Study:

• To condense key information on investigational tools for presurgical epilepsy evaluation.
• To provide a framework for tailoring epilepsy surgery pathways.
• To review common techniques for localizing seizure onset and critical brain areas.

Main Methods:

• Review of neuroimaging modalities (MRI, PET, SPECT).
• Discussion of electrophysiological techniques (EEG, MEG).
• Inclusion of functional mapping procedures (fMRI, TMS, neuropsychologic evaluation, intracarotid amobarbital test).

Main Results:

• The article outlines criteria for selecting epilepsy surgery candidates.
• It details methods for localizing seizure onset, interictal activity, and dysfunctional brain regions.
• It covers mapping of eloquent cortex to guide surgical planning.

Conclusions:

• A multimodal presurgical evaluation is essential for defining the epileptogenic zone.
• Integrating imaging, electrophysiology, and functional mapping optimizes surgical outcomes.
• This comprehensive approach is critical for managing drug-resistant epilepsy.