Meningioma MRI
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Meningioma MRI On the Web |
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American Roentgen Ray Society Images of Meningioma MRI |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Haytham Allaham, M.D. [2]
Overview
Brain MRI with gadolinium is the investigation of choice for the diagnosis of meningioma. On brain MRI, meningioma is characterized by a homogeneous, well circumscribed, and extra-axial mass with a broad dural base. Other findings on brain MRI suggestive of meningioma include CSF vascular cleft sign, dural tail sign, and sunburst or spokewheel appearance of the vessels.[1]
MRI
Head MRI may be helpful in the diagnosis of meningioma. Findings on MRI suggestive of/diagnostic of meningioma include:[2]
- Lobular, extra axial masses with well-circumscribed margins
- Broad-based dural attachment
- Inward displacement of the cortical grey matter
- Meningioma en plaque: Tumor with a more infilterating growth pattern over the dura
- Ardent, homogeneous enhancement after contrast administration
- In some cases, may have areas of central necrosis or calcification that do not enhance
- Peritumoral edema
- Dural tail: ehancement of the dura infiltrating away from the lesion
- A csf cleft (may contain csf or cortical vessels) between the tumor and the underlying brain cortex
- Intratumoral and peritumoral cysts in cystic meningiomas
- On T1-weighted sequence:
- Isointensity to slight hypointensity relative to grey matter
- Extensive dural thickening in meningioma en plaque
- Uniform low signal intensity in microcystic meningiomas
- On T2-weighted sequence:
- Isointensity to slight hyperintensity relative to grey matter
- Calcification showing as areas of low signal intensity
- High signal intensity in microcystic meningiomas
Gallery
References
- ↑ Meningioma. Radiopaedia(2015) http://radiopaedia.org/articles/meningioma Accessed on September, 25 2015
- ↑ Watts J, Box G, Galvin A, Brotchie P, Trost N, Sutherland T (2014). "Magnetic resonance imaging of meningiomas: a pictorial review". Insights Imaging. 5 (1): 113–22. doi:10.1007/s13244-013-0302-4. PMC 3948902. PMID 24399610.