ArticleAsian journal of neurosurgery2026
Long-Term Outcomes of Nonlesional Extratemporal Epilepsy Surgery Using Subdural Grid Implantation.
Article in Asian journal of neurosurgery, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Abstract
Objectives: Nonlesional extratemporal lobe epilepsy (ETE) remains one of the most challenging forms of drug-resistant epilepsy to treat surgically because seizure onset zones are often poorly defined on conventional neuroimaging. The long-term effectiveness of subdural grid-guided surgery in this population remains incompletely understood. This study aimed to evaluate long-term surgical outcomes in patients with intractable nonlesional extratemporal epilepsy who underwent subdural grid-guided epilepsy surgery. Materials and Methods: A retrospective study was conducted from January 1, 2014 to December 31, 2024. Clinical, pathological, and invasive electroencephalography data were reviewed. Seizure outcomes were assessed using Engel's classification at 6 months and 2 years after surgery. Results: Fifty-five patients with nonlesional extratemporal epilepsy were included. Seizure freedom (Engel class I) was achieved in 12 patients (21.8%) at 6 months and increased to 30 patients (54.5%) at 2 years. These improvements were not statistically significant ( Conclusion: Subdural grid-guided surgery for nonlesional extratemporal epilepsy resulted in seizure-free rates of 21.8% at 6 months and 54.5% at 2 years, with improvement over time but without statistically significant predictors of outcome.
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