Meningiomas: radiological features
Written and reviewed by Dr Ibrahim Imam, Consultant Neurologist. Last reviewed .
Meningiomas: radiological features. Extra-axial circumscribed lesions. Fully referenced neurology checklist.
Major features on MRI and CT
- Extra-axial circumscribed lesions
- Broad based attachment to the dura mater (dural tail)
- Usually single: they are multiple in about 9% of cases
- Hypo- or isointense on T1-weighted MRI
- Iso- or hyperintense on T2-weighted MRI
- CSF cleft between tumour and brain: this shows as a T2-weighted crescent
- Brain oedema adjacent to the tumour
- Vessel flow voids and enhancement: within the lesion and peripherally
- Prominent central vascular pedicle with radiating smaller vessels
- Avid contrast enhancement on CT and MRI
- Low apparent diffusion coefficient (ADC)
Magnetic resonance spectroscopy (MRS) features
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Bony features
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Angiographic features
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Features of complications
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Features of aggressiveness
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