Clinical Scorecard: A Framework for EEG Source Imaging Utilizing Network Analysis to Noninvasively Identify Epileptogenic Zones in Patients with MRI-Negative Focal Drug-Resistant Epilepsy

At a Glance

Key Highlights

• Approximately one-third of epilepsy patients develop drug-resistant epilepsy (DRE).
• Surgical resection of the epileptogenic zone (EZ) can achieve seizure freedom in 60-80% of cases.
• MRI-negative epilepsy poses significant diagnostic challenges, with lower surgical success rates.
• Electroencephalographic source imaging (ESI) improves localization accuracy in MRI-negative cases.
• Integration of network analysis enhances understanding of seizure propagation pathways.

Guideline-Based Recommendations

Diagnosis

• Utilize comprehensive presurgical evaluation including video-EEG, MRI, and PET-CT.
• Inconclusive EZ localization should lead to invasive monitoring with SEEG.

Management

• Consider individualized resective surgery for patients with confirmed EZ.

Monitoring & Follow-up

• Conduct thorough postoperative follow-up to assess seizure outcomes.

Risks

• Surgical failure rates may exceed 50% in MRI-negative extratemporal epilepsy.

Patient & Prescribing Data

15 patients with MRI-negative focal DRE

Patients underwent individualized resective surgery after comprehensive evaluation.

Clinical Best Practices

• Incorporate ESI and FC analysis in presurgical evaluations for MRI-negative epilepsy.
• Ensure multidisciplinary team discussions for complex cases.

References

• International League Against Epilepsy (ILAE) 2010 criteria
• Electroencephalographic source imaging (ESI)