Original Article

Neurosurgical Review

, Volume 31, Issue 4, pp 421-430

Tentorial meningiomas: follow-up review

  • Benedicto Oscar ColliAffiliated withDivision of Neurosurgery, Ribeirão Preto Medical School, University of São PauloDivision of Neurosurgery, Department of Surgery, Hospital das Clinicas–Ribeirão Preto Medical School, University of São PauloDepartamento de Cirurgia, HCFMRP, Campus Universitário USP Email author 
  • , João Alberto AssiratiJr.Affiliated withDivision of Neurosurgery, Hospital das Clínicas de Ribeirão Preto, FMRPUSPDivision of Neurosurgery, Department of Surgery, Hospital das Clinicas–Ribeirão Preto Medical School, University of São Paulo
  • , Danilo Jorge Pinho DeriggiAffiliated withRibeirão Preto Medical School, University of São PauloDivision of Neurosurgery, Department of Surgery, Hospital das Clinicas–Ribeirão Preto Medical School, University of São Paulo
  • , Luciano NederAffiliated withDepartment of Pathology, Ribeirão Preto Medical School, University of São PauloDivision of Neurosurgery, Department of Surgery, Hospital das Clinicas–Ribeirão Preto Medical School, University of São Paulo
  • , Antonio Carlos dos SantosAffiliated withDivision of Radiology, Ribeirão Preto Medical School, University of São PauloDivision of Neurosurgery, Department of Surgery, Hospital das Clinicas–Ribeirão Preto Medical School, University of São Paulo
  • , Carlos Gilberto CarlottiJr.Affiliated withDivision of Neurosurgery, Ribeirão Preto Medical School, University of São PauloDivision of Neurosurgery, Department of Surgery, Hospital das Clinicas–Ribeirão Preto Medical School, University of São Paulo

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Abstract

Tentorial meningiomas comprise 3–5% of the intracranial meningiomas. Different locations and sinus invasion require special surgical skills. This study aimed to analyze factors influencing the outcome of 29 patients (30 tumors) with tentorial meningiomas surgically treated. The study included 22 female and seven male patients, with age of 18–76 years old, and a follow-up of 6–179 months. Eight tumors were located on the inner tentorial ring, 15 on the outer ring, four were falcotentorial, and three attached/invading the torcula. Outcome was analyzed using survival and recurrence-free survival (RFS) curves. Twenty-seven tumors were WHO grade I and three were grades II–III. Total and subtotal resections were reached in 87.5% and 12.5% of tumors. Survival was better for patients with grade I tumors and similar according to sex, location, size, and extent of resection. Recurrence/regrowing rate was 12.5%. RFS curves were better for patients with grade I or with radical resection and similar according to sex, location, and size. There was no operative mortality. Permanent postoperative cranial nerve deficits occurred in 9.7% (all inner ring tumors). Despite being many times large-sized, surgical treatment of tentorial meningiomas gives good results. Prognostic factors for recurrence were histopathologic grade III and subtotal resection. Radical resection allowed better results. Nevertheless, subtotal resection may be acceptable for cases with cranial nerves or sinuses invasions.

Keywords

Tentorial meningiomas Surgical treatment Extent of resection Survival curves and recurrence-free survival curves Outcome