title: Modification of peri-insular hemispherotomy and surgical results.
abstract: OBJECTIVE
  We modified the peri-insular hemispherotomy technique devised by Villemure and Mascott. Our modified technique and the surgical results obtained with this method are presented.
  
  
  METHODS
  The frontoparietal operculum is resected, and the resection cavity is connected with the lateral ventricle. Through this cavity, a transventricular corpus callosotomy and resection of the medial temporal structures are performed.
  
  
  RESULTS
  This technique was used for 34 patients, with satisfactory surgical results. Cerebrospinal fluid shunt placement was necessary for five patients, and incomplete callosal sectioning was postoperatively detected in three cases.
  
  
  CONCLUSIONS
  Our modification of the peri-insular hemispherotomy can be safely and effectively used to treat epilepsy caused by hemispheric lesions, even in cases without ventricular dilation.
authors.affiliation: Department of Neurosurgery, Tokyo Metropolitan Neurological Hospital, Japan. smzh@tmnh.fuchu.tokyo.jp
authors.forename: H
authors.initials: H
authors.lastname: Shimizu
authors.forename: T
authors.initials: T
authors.lastname: Maehara
mesh_terms: D000293:Adolescent; D000328:Adult; D001921:Brain / Q000473:pathology / Q000601:surgery*; D001929:Brain Edema / Q000209:etiology; D002648:Child; D002675:Child, Preschool; D004827:Epilepsy / Q000175:diagnosis / Q000209:etiology / Q000601:surgery*; D005260:Female; D006801:Humans; D006849:Hydrocephalus / Q000150:complications / Q000601:surgery; D007223:Infant; D008279:Magnetic Resonance Imaging; D008297:Male; D009493:Neurosurgery / Q000379:methods*; D011183:Postoperative Complications; D017287:Ventriculoperitoneal Shunt