title: Unilateral frontal interhemispheric transfalcial approaches for the removal of olfactory groove meninjiomas.
abstract: OBJECTIVE
  A unilateral subfrontal interhemispheric transfalcial approach for the removal of olfactory groove meningiomas (OGM) was evaluated in terms of surgical technique, complications, clinical outcomes, and recurrence rate.
  
  
  METHODS
  Twenty-four females and eighteen males with a mean age of 59 years were operated on for OGM within a 12- year (1996-2008) period. The pre- and post-operative Mini-Mental Test (MMT) scores, visual impairment scores (VIS), pre-operative clinical symptoms (headache, epileptic seizure and anosmia), Karnofsky performance scores (KPS), tumor size and tumor extensions were evaluated. The effects of the pre-operative parameters on post-operative MMT, VIS and KPS were investigated.
  
  
  RESULTS
  Tumor size and pre-operative MMT significantly affected pre-operative KPS. Mean tumor diameter was 5.6±0.8 cm. Total excision was achieved in 97.6% of all cases. No peri-operative mortality was seen. Ten patients (23.8%) experienced surgery-related complications. The mean follow-up period of cases was 52 months, and the rate of residual tumor re-growth was 2.3%. No parameter showed any effect on post-operative KPS, as no significant difference was seen between pre- and post-operative KPS. A significant positive difference was detected between pre- and post-operative MMT and VIS.
  
  
  CONCLUSIONS
  A unilateral subfrontal interhemispheric transfalcial approach can be the preferred modality for treating OGM.
authors.affiliation: Sisli Etfal Research and Education Hospital, Department of Neurosurgery, Istanbul, Turkey. mmusluman@yahoo.com
authors.forename: Ahmet Murat
authors.initials: AM
authors.lastname: Musluman
authors.forename: Adem
authors.initials: A
authors.lastname: Yilmaz
authors.forename: Tufan Canseve
authors.initials: TC
authors.lastname: R
authors.forename: Halit
authors.initials: H
authors.lastname: Cavusoglu
authors.forename: Okan
authors.initials: O
authors.lastname: Kahyaoglu
authors.forename: Yunus
authors.initials: Y
authors.lastname: Aydin
mesh_terms: D000328:Adult; D000368:Aged; D004388:Dura Mater / Q000601:surgery; D005004:Ethmoid Bone / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D005624:Frontal Bone / Q000601:surgery*; D006801:Humans; D008297:Male; D008577:Meningeal Neoplasms / Q000601:surgery*; D008579:Meningioma / Q000601:surgery*; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000517:prevention & control; D019635:Neurosurgical Procedures / Q000379:methods*; D011183:Postoperative Complications / Q000517:prevention & control; D011446:Prospective Studies; D054063:Superior Sagittal Sinus / Q000601:surgery