title: Olfactory groove meningiomas: surgical technique and follow-up review.
abstract: BACKGROUND
  Olfactory groove meningiomas comprise 4-10% of the intracranial meningiomas. Generally they give signs of brain compression due to great size they reach before diagnosis. In this study, the clinical outcome of patients with olfactory groove meningiomas surgically treated was analyzed.
  
  
  METHODS
  17 patients operated on from 1988-2006. Female: 16, Male: 1. Age: 19-76 years-old (mean=53.12 +/- 13.11).
  
  
  RESULTS
  1-209 months (mean=51.07 +/- 12.73. Bifrontal/bifrontal-bi-orbital approaches were used. Outcome was analyzed using survival/recurrence-free Kaplan-Mayer curves.
  
  
  RESULTS
  16 had WHO grade 1; one grade 2 meningiomas. Resection Simpson's grade 1 was in achieved in 64.7%, grade 2 in 29.4% and grade 3 in 5.9%. There was no recurrence during the follow-up. Global and operative mortality were 11.8%. Main postoperative complications were osteomyelitis (11.8%) and pneumonia (5.9%).
  
  
  CONCLUSIONS
  Extensive approaches allowed total resection of most olfactory groove meningiomas with no recurrence during the follow-up, but operative mortality and local complications were high.
authors.affiliation: Division of Neurosurgery, Department of Surgery, Hospital das Clinicas, Ribeirão Preto Medical School, University of São Paulo, 14048-900 Ribeirão Preto, SP, Brazil. bocolli@fmrp.usp.br
authors.forename: Benedicto Oscar
authors.initials: BO
authors.lastname: Colli
authors.forename: Carlos Gilberto
authors.initials: CG
authors.lastname: Carlotti
authors.forename: João Alberto
authors.initials: JA
authors.lastname: Assirati
authors.forename: Marcius Benigno Marques dos
authors.initials: MB
authors.lastname: Santos
authors.forename: Luciano
authors.initials: L
authors.lastname: Neder
authors.forename: Antonio Carlos dos
authors.initials: AC
authors.lastname: Santos
authors.forename: Nayara Cioffi
authors.initials: NC
authors.lastname: Batagini
mesh_terms: D000328:Adult; D000368:Aged; D003399:Craniotomy / Q000379:methods; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008577:Meningeal Neoplasms / Q000401:mortality / Q000601:surgery*; D008579:Meningioma / Q000401:mortality / Q000601:surgery*; D008875:Middle Aged; D009367:Neoplasm Staging; D011183:Postoperative Complications; D012189:Retrospective Studies; D016019:Survival Analysis; D016896:Treatment Outcome