title: Fully Endoscopic Resection of Cerebellopontine Angle Meningiomas.
abstract: OBJECTIVE
  To describe our operative technique and results from patients who underwent fully endoscopic resection of cerebellopontine angle (CPA) meningiomas.
  
  
  METHODS
  Prospective observational study.
  
  
  METHODS
  A single academic institution that includes both neurosurgery and neuro-otology.
  
  
  METHODS
  Eleven consecutive patients who underwent fully endoscopic resection of a CPA meningioma.
  
  
  METHODS
  Hearing preservation, based on the American Association of Otolaryngology-Head and Neck Surgeons score as well as facial nerve preservation base on the House-Brackmann (HB) score. In addition, the extent of resection and complication rates was studied.
  
  
  RESULTS
  All 11 patients underwent successful gross total resection, Simpson grade 2, of their meningioma, seen both intraoperatively and on postoperative imaging. Overall, 100% of patients maintained normal facial nerve function (HB 1/6). Audiometric testing revealed that 10 of 11 patients maintained either stable or improved hearing postoperatively based on Committee on Hearing and Equilibrium Guidelines for the Evaluation of Hearing Preservation in Acoustic Neuroma grade with the remaining patient retaining serviceable hearing. Tumor size ranged from 0.5 to 2.5 cm (mean: 1.54 cm). Mean operative time was 166 minutes (range: 122-207 minutes); estimated blood loss averaged 54.5 mL. Hospital length of stay ranged from 2 to 6 days (mean: 3.1 days), and a superficial wound infection was the only complication seen in one patient.
  
  
  CONCLUSIONS
  Fully endoscopic techniques can be used in CPA meningioma resection with excellent clinical results as an alternative to the traditional open microscopic approach.
authors.affiliation: Section of Neurosurgery, St. John Providence Health System/Michigan State University, Southfield, Michigan, United States.
authors.forename: Pradeep
authors.initials: P
authors.lastname: Setty
authors.affiliation: Section of Neurosurgery, St. John Providence Health System/Michigan State University, Southfield, Michigan, United States.
authors.forename: Kenneth P
authors.initials: KP
authors.lastname: D'Andrea
authors.affiliation: Department of Neurotology, Michigan Ear Institute, Farmington Hills, Michigan, United States.
authors.forename: Emily Z
authors.initials: EZ
authors.lastname: Stucken
authors.affiliation: Department of Neurotology, Michigan Ear Institute, Farmington Hills, Michigan, United States.
authors.forename: Seilish
authors.initials: S
authors.lastname: Babu
authors.affiliation: Department of Neurotology, Michigan Ear Institute, Farmington Hills, Michigan, United States.
authors.forename: Michael J
authors.initials: MJ
authors.lastname: LaRouere
authors.affiliation: Professor of Neurosurgery, Oakland University William Beaumont School of Medicine, Michigan, United States.
authors.forename: Daniel R
authors.initials: DR
authors.lastname: Pieper
mesh_terms: D000328:Adult; D000368:Aged; D016063:Blood Loss, Surgical / Q000706:statistics & numerical data; D002528:Cerebellar Neoplasms / Q000473:pathology / Q000601:surgery*; D002530:Cerebellopontine Angle / Q000473:pathology / Q000601:surgery*; D004724:Endoscopy / Q000379:methods*; D005154:Facial Nerve; D005260:Female; D006309:Hearing; D006801:Humans; D008297:Male; D008579:Meningioma / Q000473:pathology / Q000601:surgery*; D008875:Middle Aged; D018365:Neoplasm, Residual / Q000473:pathology; D019635:Neurosurgical Procedures / Q000379:methods*; D011183:Postoperative Complications / Q000453:epidemiology; D012189:Retrospective Studies; D016896:Treatment Outcome