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Predicting long-term seizure outcome after resective epilepsy surgery: the multicenter study.
S S Spencer1, A T Berg, B G Vickrey
1Department of Neurology, Yale University School of Medicine, New Haven, CT 06520-8018, USA. susan.spencer@yale.edu
Neurology
|September 28, 2005
Summary
Predictors of seizure remission after epilepsy surgery were identified. Hippocampal atrophy and absence of generalized tonic-clonic seizures predicted 2-year remission in medial temporal resections.
Area of Science:
- Neurology
- Neurosurgery
Background:
- Resective epilepsy surgery aims to achieve seizure freedom.
- Understanding predictors of remission and relapse is crucial for patient outcomes.
Purpose of the Study:
- To examine the probability and predictors of achieving 2-year seizure remission after epilepsy surgery.
- To investigate the risk factors for seizure relapse following 2-year remission.
Main Methods:
- A prospective observational study involving 396 patients aged 12+ undergoing epilepsy surgery.
- Standardized evaluation, treatment, and follow-up were employed.
- Statistical analyses (chi-squared, proportional hazards) assessed predictors of remission and relapse.
Main Results:
- 223 out of 339 (66%) patients achieved 2-year remission.
- Hippocampal atrophy and absence of generalized tonic-clonic seizures predicted remission in medial temporal resections.
- Fifty-five patients relapsed; delay to remission predicted relapse in medial temporal resections.
Conclusions:
- Hippocampal atrophy and absence of generalized tonic-clonic seizures are key predictors of 2-year remission, specifically in medial temporal resections.
- These findings aid in predicting surgical outcomes for epilepsy patients.