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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
Abstract:
One case of intradiploic meningioma, causing partial occlusion of the superior longitudinal sinus, with subsequent visual trouble and another of lipomatous meningioma with great fat content and very calcified, that was found in a LCR fistula study of the cranial anterior stage, are described by the authors as atypical meningiomas.
Insights
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.
- 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.