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[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.

Arquivos De Neuro-Psiquiatria
|June 18, 1998
PubMed
Summary

Meningioma classification into typical, atypical, and anaplastic subtypes effectively predicts tumor recurrence risk. Brain invasion is a key indicator for non-typical meningiomas, highlighting the importance of histological grading in patient management.

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Area of Science:

  • Neuropathology
  • Oncology

Context:

  • Meningiomas are the most common primary intracranial tumors.
  • Accurate classification is crucial for predicting prognosis and guiding treatment.

Purpose:

  • To evaluate the adequacy of current criteria for classifying meningiomas (typical, atypical, anaplastic, papillary).
  • To determine the correlation between histological subtypes and tumor recurrence rates.

Summary:

  • The study analyzed 246 meningioma cases, classifying them based on established criteria.
  • Typical meningiomas occurred in 75.22%, atypical in 19.1%, and anaplastic in 5.68%.
  • Brain invasion was a predominant feature (62.3%) in non-typical tumors.
  • Recurrence rates were significantly higher in atypical (42.55%) and anaplastic (45.45%) meningiomas compared to typical (3.78%).

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Impact:

  • The findings validate current histological grading systems for meningiomas.
  • Classification criteria are adequate for predicting tumor recurrence risk.
  • This supports tailored treatment strategies based on tumor aggressiveness.