Olfactory groove meningiomas: surgical technique and follow-up review.
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.
Colli
Benedicto Oscar
BO
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
Carlotti
Carlos Gilberto
CG
Assirati
João Alberto
JA
Santos
Marcius Benigno Marques dos
MB
Neder
Luciano
L
Santos
Antonio Carlos dos
AC
Batagini
Nayara Cioffi
NC
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