Epilepsy Surgery: Can Advanced Monitoring Improve Outcomes for Children?
"A new study explores how post-resection monitoring can lead to better seizure control in pediatric epilepsy surgery."
Epilepsy surgery offers a potential pathway to seizure freedom for children with drug-resistant neocortical epilepsy. However, achieving lasting seizure control remains a significant challenge. Traditional surgical approaches often fall short due to the complex nature of epileptogenic zones, where seizures originate.
Incomplete resection of these neocortical epileptogenic foci—the areas of the brain where seizures start—is a primary reason for failed epilepsy surgeries in children. These areas can be difficult to identify precisely, and sometimes, seizure activity can arise from multiple locations or regions adjacent to critical brain functions.
To address this challenge, a specialized surgical approach has emerged, employing invasive monitoring techniques to precisely locate and resect seizure onset zones. This method often involves a staged approach, including post-resection invasive monitoring (PRM) to ensure complete removal of the epileptogenic focus and identify any additional seizure-generating areas. A recent study published in Epilepsy Research sheds light on the effectiveness of this approach, offering new insights into improving surgical outcomes for children with neocortical epilepsy.
Pediatric Epilepsy Surgery Statistics and Disparities
Approximately one-third of epilepsy patients develop drug-resistant epilepsy, with 20–30% of children with recurrent seizures falling into this category. A retrospective study using the Pediatric Health Information System database found that insurance type, race, and ethnicity are main predictors of both surgery use and time from diagnosis to surgery. National trends from 2016–2022 indicate that insurance-based access gaps in pediatric epilepsy surgery persist or may be widening. The Pediatric Epilepsy Research Consortium Surgery Interest Group, formed in 2018, is a network of U.S. pediatric epilepsy centers working to characterize surgery use and investigate patient selection, evaluation strategies, and outcomes.
Current Surgical Standards and Persistent Barriers
Pediatric epilepsy surgery is an increasingly used evidence-based management option with low risks for complications, and developments in neuroimaging and advanced diagnostics have widened the spectrum of children who could benefit. Surgery is now considered a standard management approach for drug-resistant epilepsy, with data indicating that early surgery improves outcomes. Minimally invasive approaches such as burr hole hemispherotomy offer suitable options for patients with drug-resistant hemispheric epilepsy, particularly those at risk for wound healing difficulties or with extensive scalp scarring. Despite these advances, substantial delays to surgery persist, with a scoping review identifying multiple barriers to timely surgical intervention in the pediatric population.
Historical Milestones in Epilepsy Surgery
Major milestones in promoting epilepsy surgery include the Conference on Presurgical Evaluation of Epileptics in Zurich in 1986 and the first Palm Desert Conference on Surgical Treatment of the Epilepsies held in California the same year, with a follow-up Palm Desert conference in 1992 contributing to the propagation and harmonization of surgical practices. These foundational conferences helped establish standardized approaches to presurgical evaluation and surgical treatment. Recent comprehensive reviews continue to summarize updates in epilepsy surgery evaluation and provide current status assessments of pediatric epilepsy surgery, including advances and innovations in the field.
Post-Resection Monitoring (PRM): A Closer Look at the Technique
The study, led by Eveline Teresa Hidalgo and colleagues at NYU Langone Health, retrospectively reviewed the charts of pediatric patients with neocortical epilepsy who underwent resective surgery with PRM. The aim was to evaluate the technique and outcomes of this multi-staged surgical approach.
- Initial Assessment: Comprehensive pre-operative evaluation, including VEEG (video electroencephalography) and MRI, to identify potential seizure onset zones.
- Invasive Monitoring: Placement of subdural and depth electrodes to precisely map seizure activity.
- Resection: Surgical removal of the identified epileptogenic lesion and surrounding tissue.
- Post-Resection Monitoring (PRM): Re-implantation of electrodes to monitor brain activity after the initial resection. This step is crucial for detecting residual epileptogenic activity or uncovering new seizure foci.
- Re-resection (if necessary): Additional surgery to remove any remaining epileptogenic tissue identified during PRM.
Recent Advances in Pediatric Epilepsy Surgery Research
The American Neurological Association has investigated recent pediatric epilepsy surgeries, with a 2026 review examining developments in gene therapy for epilepsy and its potential to deliver targeted, long-lasting treatments for drug-resistant epilepsy. Current treatment paradigms recognize pediatric epilepsy as arising from various etiologies including structural, genetic, immune, infectious, metabolic, and unknown causes, with anti-seizure medications remaining primary treatment while surgical interventions, ketogenic diet, and emerging therapies have become increasingly effective for drug-resistant cases. However, a 2026 evidence review concluded that while epilepsy surgery in pediatric populations can lead to neuropsychological, cognitive, and behavioral improvements, outcomes remain heterogeneous, reflecting variability in clinical presentation and the current state of evidence.
Surgical Failure Rates and Persistent Delays
While resection is a safe and effective treatment option for children with pharmacoresistant focal epilepsy, some patients continue to experience seizures after surgery, and most studies have focused on predictors of success rather than failure mechanisms. A quantitative and qualitative analysis of epilepsy surgery failure in children highlights the need to better understand why certain patients do not achieve seizure freedom. Additionally, substantial delays to surgery persist despite evidence that epilepsy surgery can improve developmental and seizure outcomes in children with drug-resistant epilepsy, with a scoping review synthesizing barriers and evaluating interventions aimed at overcoming these delays.
Comparative Effectiveness of Surgical Approaches
Comparative analyses of different surgical approaches for pediatric epilepsy remain limited in the current literature, with most studies focusing on individual procedure outcomes rather than head-to-head comparisons. Available evidence suggests that outcomes vary significantly based on surgery type, underlying pathology, and completeness of resection, but methodological differences across studies make direct comparisons challenging. The heterogeneity in patient populations, surgical techniques, and outcome measures across centers complicates efforts to establish clear superiority of one approach over another for specific epilepsy syndromes.
The Promise of Improved Seizure Control
The findings suggest that post-resection monitoring provides critical information about the extent of the epileptogenic zone, identifying residual activity at the margins of the resection cavity and unmasking additional seizure foci. This approach may be particularly beneficial in achieving long-term, stable seizure-free outcomes for children with complex epilepsy.
Expert Perspectives on Surgery Utilization and Outcomes
Surgery is recognized as an effective yet underutilized treatment for children with drug-resistant epilepsy, with significant variability in recommending surgery across Level IV epilepsy centers despite well-described predictors of surgical outcomes. Evidence demonstrates that epilepsy surgery is more effective than medical therapy alone for seizure control, though understanding seizure outcomes across different surgery locations, pathologies, nonlesional epilepsy cases, and incomplete resections remains critical for presurgical counseling. This variability in surgical recommendation practices highlights the need for more standardized decision-making frameworks.
Emerging Directions in Pediatric Epilepsy Surgery
Future directions in pediatric epilepsy surgery include advancing gene therapy approaches for targeted, long-lasting treatments of drug-resistant epilepsy, as well as refining minimally invasive surgical techniques. Integration of advanced neuroimaging, genetic diagnostics, and biomarkers promises to improve patient selection and surgical planning. Emerging technologies such as responsive neurostimulation and laser interstitial thermal therapy may expand the pool of surgical candidates, while efforts to reduce disparities in access and standardize presurgical evaluation protocols could address current systemic inequities.
Systemic Barriers to Equitable Surgical Care
Systemic challenges in pediatric epilepsy surgery include persistent disparities based on insurance status, race, and ethnicity that affect both access to surgery and timeliness of intervention. The concentration of specialized Level IV epilepsy centers in certain geographic regions creates access barriers for families in underserved areas. Insurance-based access gaps have been documented as persisting or potentially widening over recent years, while variability in surgical recommendation practices across centers suggests a lack of standardized referral and evaluation pathways.
Patient and Family Experiences
For children with drug-resistant epilepsy and their families, the journey to surgery often involves prolonged seizure burden, developmental delays, and significant psychosocial stress while navigating complex healthcare systems. Delays in surgical intervention can have lasting impacts on cognitive development, quality of life, and family dynamics. The heterogeneity in surgical outcomes means that even after successful seizure reduction, many children require ongoing support for neuropsychological, behavioral, and educational needs, underscoring the importance of comprehensive, multidisciplinary care models that extend beyond the surgical procedure itself.