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Updated: Aug 19, 2026

Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery
Published on: July 5, 2021
[Meningiomas. Histopathological aspects and recurrence]
A Hilbig1, L M Barbosa-Coutinho
1Departamento de Patologia da Fundação Faculdade Federal de Ciências Médicas de Porto Alegre (FFFCMPA), Brasil.
Abstract:
The authors assessed 246 cases of meningiomas that were classified as typical, atypical, anaplastic and papillary, according to previously defined criteria. Among the criteria used to define non-typical tumours, brain invasion was predominant in 62.3%. Meningiomas were typical in 75.22%, atypical in 19.1%, anaplastic in 5.68% of the cases. There was recurrence in 3.78% of typical, 42.55% of atypical and 45.45% of anaplastic. The authors conclusion was that the criteria used to define typical and non-typical were adequate to predict a higher chance to tumour recurrences
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