title: [Image-guided endoscopic transsphenoidal removal of pituitary adenoma].
abstract: OBJECTIVE
  To assess the role of neuronavigation in assisting endoscopic transsphenoidal surgery for pituitary adenomas.
  
  
  METHODS
  Ten endoscopic endonasal transsphenoidal reoperations for pituitary adenomas were selected. Clinical records were reviewed retrospectively. Five of 10 patients had gigantic adenoma, 3 microadenoma, 2 large adenoma.
  
  
  RESULTS
  The mean setup time was 5 minutes, and the operative time was 50 minutes in image-guided procedures. In all cases, the system worked well without malfunction. Continuous information regarding instrument location and trajectory was provided to the surgeon. Measurements of intraoperative accuracy in the axial, coronal, and.sagittal planes indicated a mean verified system error of 1.5 mm. for pituitary adenomas. After operation, the symptoms relieved in all patients.
  
  
  CONCLUSIONS
  Neuronavigation can be applied during endonasal transsphenoidal endoscopic surgery and requires a minimal amount of time. It makes reoperation easier, faster, and safer.
authors.affiliation: Department of Otorhinolaryngology, Xuanwu Hospital, Affiliated to Capital University of Medical Sciences, Beijing 100053, China. zhangqiuhang@yahoo.com.cn
authors.forename: Qui-Hang
authors.initials: QH
authors.lastname: Zhang
authors.forename: Hai-Sheng
authors.initials: HS
authors.lastname: Liu
authors.forename: Da-Zhang
authors.initials: DZ
authors.lastname: Yang
authors.forename: Jing-Yu
authors.initials: JY
authors.lastname: Cheng
mesh_terms: D000328:Adult; D004724:Endoscopy; D005260:Female; D006801:Humans; D007016:Hypophysectomy / Q000379:methods*; D008297:Male; D008875:Middle Aged; D010911:Pituitary Neoplasms / Q000601:surgery*; D012189:Retrospective Studies; D013101:Sphenoid Sinus / Q000601:surgery; D025321:Surgery, Computer-Assisted