title: Image-guided, frameless stereotactic sectioning of the corpus callosum in children with intractable epilepsy.
abstract: Corpus callosotomy is an effective neurosurgical procedure for children with intractable atonic or drop attack seizures. While this procedure has not changed significantly over the past three decades, some technical issues remain to be resolved. These include the intraoperative determination of the extent of the callosotomy, the need to stage the procedure, as well as side of approach of craniotomy. We report our 8-year experience with corpus callosotomy using a frameless stereotactic image-guided system (ISG Viewing Wand). Seventeen children with atonic seizures underwent sectioning of the corpus callosum. The mean patient age was 10.5 years. Six children underwent complete callosotomy while 11 underwent resection of the anterior two-thirds. MRI 3D reconstruction of the sagittal sinus and draining cerebral veins was undertaken in all cases. The side of the craniotomy was determined on the basis of favorability of the draining veins with respect to the extent of the callosotomy. The extent of the callosotomy was determined by intraoperative feedback using the ISG Viewing Wand((R)). Nine of 11 patients in the partial callosotomy group and 4 of 6 patients in the complete callosotomy group showed significant improvement in atonic seizures. We conclude that the use of frameless stereotaxy can function as an important adjunct in the planning and conduction of successful sectioning of the corpus callosum in children with intractable seizures.
authors.affiliation: Division of Neurosurgery, Hospital for Sick Children and University of Toronto, Ont., Canada.
authors.forename: M
authors.initials: M
authors.lastname: Hodaie
authors.forename: A
authors.initials: A
authors.lastname: Musharbash
authors.forename: H
authors.initials: H
authors.lastname: Otsubo
authors.forename: O C
authors.initials: OC
authors.lastname: Snead
authors.forename: S
authors.initials: S
authors.lastname: Chitoku
authors.forename: A
authors.initials: A
authors.lastname: Ochi
authors.forename: S
authors.initials: S
authors.lastname: Holowka
authors.forename: H J
authors.initials: HJ
authors.lastname: Hoffman
authors.forename: J T
authors.initials: JT
authors.lastname: Rutka
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003337:Corpus Callosum / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D004827:Epilepsy / Q000601:surgery*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional / Q000295:instrumentation; D007432:Intraoperative Period; D008279:Magnetic Resonance Imaging; D008297:Male; D011859:Radiography; D013238:Stereotaxic Techniques / Q000295:instrumentation*