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[Atypical meningioma].

Z Magalhães1, J R Pereira, P Moniz

  • 1Serviços de Neurorradiologia, Neurologia, Neurocirurgia e Anatomia Patológica, Hospital Pedro Hispano, Matosinhos.

Acta Medica Portuguesa
|April 27, 2001
PubMed
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This study describes two rare atypical meningiomas. One caused sinus occlusion and vision issues, while another, a lipomatous meningioma, was highly calcified and fatty.

Area of Science:

  • Neurosurgery
  • Neuropathology
  • Radiology

Background:

  • Meningiomas are tumors arising from the meninges.
  • Atypical meningiomas represent a less common subtype with distinct histological features.
  • Intradiploic and lipomatous meningiomas are rare variants.

Observation:

  • A case of intradiploic meningioma partially occluding the superior longitudinal sinus, leading to visual disturbances.
  • A second case of a lipomatous meningioma with significant fat content and calcification, identified during a cerebrospinal fluid (CSF) fistula study of the anterior cranial base.

Findings:

  • Both described meningiomas exhibited characteristics that led to their classification as atypical.
  • The intradiploic meningioma's location impacted venous drainage and caused neurological symptoms.

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  • The lipomatous meningioma presented unique histological and radiological features.

    • Implications:

    • Highlights the importance of recognizing diverse meningioma presentations.
    • Emphasizes the diagnostic challenges posed by rare meningioma subtypes.
    • Contributes to understanding the clinical and pathological spectrum of meningiomas.