title: Electrocorticography and seizure outcomes in children with lesional epilepsy.
abstract: OBJECTIVE
  The use of electrocorticographically (ECoG)-guided cortical resection in children with lesional epilepsy is controversial. Given the important developmental issues associated with recurrent childhood seizures, sustained seizure control is a key therapeutic goal. We therefore evaluated the effect of the decision to perform lesionectomy or ECoG-guided cortical resection on seizure outcome and surgical morbidity in the pediatric population.
  
  
  METHODS
  We retrospectively analyzed seizure outcomes in 67 patients between the ages of 3 months and 16 years who underwent surgery for lesional epilepsy at British Columbia Children's Hospital. Thirty-four patients underwent ECoG, and 33 patients had lesionectomy without ECoG.
  
  
  RESULTS
  One year post-operatively, 80% of patients who had ECoG-guided cortical resection or lesionectomy were seizure free. However, there was a trend toward improved seizure freedom in patients who had ECoG at most recent follow-up (79% patients with ECoG seizure free, vs. 61% with lesionectomy only; mean follow-up time 5.8 year, P=0.078). There was no increase in neurological morbidity in patients who had ECoG-guided cortical resection, and these patients were less likely to experience repeat epilepsy surgery.
  
  
  CONCLUSIONS
  Overall, using ECoG to guide additional cortical resection may lead to more robust seizure freedom in children with lesional epilepsy without increasing their risk of surgical morbidity.
authors.affiliation: Division of Pediatric Neurology, Department of Pediatrics, University of British Columbia and British Columbia's Children's Hospital, Vancouver, BC, Canada. jgelinas@cw.bc.ca
authors.forename: Jennifer N
authors.initials: JN
authors.lastname: Gelinas
authors.forename: Andrew W
authors.initials: AW
authors.lastname: Battison
authors.forename: Sherry
authors.initials: S
authors.lastname: Smith
authors.forename: Mary B
authors.initials: MB
authors.lastname: Connolly
authors.forename: Paul
authors.initials: P
authors.lastname: Steinbok
mesh_terms: D000293:Adolescent; D002540:Cerebral Cortex / Q000503:physiopathology / Q000601:surgery*; D002648:Child; D002675:Child, Preschool; D004569:Electroencephalography; D004827:Epilepsy / Q000503:physiopathology / Q000601:surgery*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012189:Retrospective Studies; D012640:Seizures / Q000503:physiopathology / Q000601:surgery*; D016896:Treatment Outcome