title: Technical considerations of endoscopic septostomy using a biportal approach in a case of hydrocephalus associated with tuberous sclerosis.
abstract: BACKGROUND
  We report herein the technical considerations for endoscopic septostomy in a case of hydrocephalus associated with tuberous sclerosis.
  
  
  METHODS
  A 17-year-old boy presented with visual and gait disturbances. Computed tomography revealed an intraventricular mass obstructing the foramen of Monro bilaterally and marked hydrocephalus. First, we planned a ventriculo-peritoneal shunt with endoscopic septostomy using a biportal approach to resolve the hydrocephalus. Guidance by a rigid endoscope inserted into the anterior horn of the left lateral ventricle allowed us to easily and safely perform septostomy using the fiberscope inserted into the anterior horn of the right lateral ventricle.
  
  
  CONCLUSIONS
  A biportal approach such as the dual endoscopic technique is useful in the treatment of complicated intraventricular lesions with loss of midline structures.
authors.affiliation: Department of Neurosurgery, Faculty of Medicine, University of Toyama, Toyama, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Hamada
authors.forename: N
authors.initials: N
authors.lastname: Hayashi
authors.forename: K
authors.initials: K
authors.lastname: Kurosaki
authors.forename: M
authors.initials: M
authors.lastname: Kurimoto
authors.forename: S
authors.initials: S
authors.lastname: Endo
mesh_terms: D000293:Adolescent; D001921:Brain / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D002551:Cerebral Ventricle Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D002552:Cerebral Ventricles / Q000473:pathology / Q000601:surgery; D002557:Cerebrospinal Fluid Shunts / Q000379:methods; D004724:Endoscopy / Q000379:methods*; D007839:Functional Laterality / Q000502:physiology; D018315:Glioma, Subependymal / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D006801:Humans; D006849:Hydrocephalus / Q000209:etiology* / Q000473:pathology / Q000601:surgery*; D020547:Lateral Ventricles / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D008297:Male; D009364:Neoplasm Recurrence, Local; D038361:Neuronavigation / Q000379:methods; D019635:Neurosurgical Procedures / Q000295:instrumentation / Q000379:methods; D012086:Reoperation; D012688:Septum Pellucidum / Q000033:anatomy & histology / Q000000981:diagnostic imaging / Q000601:surgery*; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D014402:Tuberous Sclerosis / Q000150:complications* / Q000473:pathology; D014696:Ventriculostomy / Q000295:instrumentation / Q000379:methods*; D015354:Vision, Low / Q000000981:diagnostic imaging / Q000209:etiology / Q000473:pathology