title: Endoscopic anatomic features of the triangular recess.
abstract: OBJECTIVE
  To describe the morphological and topographic features of the triangular recess (TR) in the anterior wall of the third ventricle and the pathological conditions that allow its observation during ventricular endoscopic neuronavigation.
  
  
  METHODS
  A systematic review of records and operative videotapes for 145 patients who underwent endoscopic third ventriculostomy was performed.
  
  
  RESULTS
  The TR could be recognized in five cases of hydrocephalus, each caused by a different underlying pathological condition. The approach was precoronal in four cases and suboccipital in one. The morphological and topographic features of the TR and adjacent structures varied among the different cases.
  
  
  CONCLUSIONS
  Although it is seldom reported in neuroanatomy handbooks and is not readily accessible under normal conditions, the TR is a characteristic structure of the third ventricle, which might become apparent in several conditions that produce hydrocephalus. Neurosurgeons who perform neuroendoscopy should be aware of this structure and of the situations that cause its deformation and allow its observation during endoscopic neuronavigation.
authors.affiliation: Department of Neurosciences, Neurosurgical Unit, Treviso Hospital, Treviso, Italy.
authors.forename: Pierluigi
authors.initials: P
authors.lastname: Longatti
authors.forename: Andrea
authors.initials: A
authors.lastname: Martinuzzi
authors.forename: Alessandro
authors.initials: A
authors.lastname: Fiorindi
authors.forename: Slobodan
authors.initials: S
authors.lastname: Malobabic
authors.forename: Alessandro
authors.initials: A
authors.lastname: Carteri
mesh_terms: D000328:Adult; D000368:Aged; D001927:Brain Diseases / Q000473:pathology* / Q000601:surgery; D004724:Endoscopy; D005260:Female; D006801:Humans; D008297:Male; D008499:Medical Records; D008875:Middle Aged; D038361:Neuronavigation; D012189:Retrospective Studies; D020542:Third Ventricle / Q000473:pathology* / Q000601:surgery; D014696:Ventriculostomy; D014743:Videotape Recording