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| ==Gallery== | | ==Gallery== |
| <gallery>
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| MRI convexity meningioma.jpg|Convexity meningioma<ref name="r">Image courtesy of Dr Sajoscha Sorrentino [http://www.radiopaedia.org Radiopaedia](original file [http://radiopaedia.org/cases/convexity-meningioma-1 "here"]). [http://radiopaedia.org/licence Creative Commons BY-SA-NC]</ref>
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| MRI Atypical meningioma.jpg|Atypical meningioma<ref name="r">Image courtesy of Dr Sajoscha Sorrentino [http://www.radiopaedia.org Radiopaedia](original file [http://radiopaedia.org/cases/convexity-meningioma-1 "here"]). [http://radiopaedia.org/licence Creative Commons BY-SA-NC]</ref>
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| MRI meningioma anaplastic Dr Frank Gaillard.jpg|Anaplastic meningioma<ref>Image courtesy of Dr Frank Gaillard [http://www.radiopaedia.org Radiopaedia](original file [http://radiopaedia.org/images/22491 "here"]). [http://radiopaedia.org/licence Creative Commons BY-SA-NC]</ref>
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| MRI malignant meningioma Dr Ahmed Abd Rabou.jpg|Malignant meningioma<ref name="r">Image courtesy of Dr Ahmed Abd Rabou [http://www.radiopaedia.org Radiopaedia](original file [http://radiopaedia.org/cases/malignant-meningioma-1 "here"]). [http://radiopaedia.org/licence Creative Commons BY-SA-NC]</ref>
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| MRI olfactory meningioma Dr Frank Gaillard.jpg|Olfactory meningioma<ref name="r">Image courtesy of Dr Frank Gaillard [http://www.radiopaedia.org Radiopaedia](original file [http://radiopaedia.org/cases/olfactory-groove-meningioma-3 "here"]). [http://radiopaedia.org/licence Creative Commons BY-SA-NC]</ref>
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| MRI meningioma cystic Dr Frank Gaillard.jpg|Cystic meningioma<ref name="r">Image courtesy of Dr Frank Gaillard [http://www.radiopaedia.org Radiopaedia](original file [http://radiopaedia.org/images/880 "here"]). [http://radiopaedia.org/licence Creative Commons BY-SA-NC]</ref>
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| MRI meningioma dural tail sign Dr Frank Gaillard.jpg|Meningioma dural tail sign<ref name="r">Image courtesy of Dr Frank Gaillard [http://www.radiopaedia.org Radiopaedia](original file [http://radiopaedia.org/cases/meningioma-with-dural-tail "here"]). [http://radiopaedia.org/licence Creative Commons BY-SA-NC]</ref>
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| MRI meningioma with vascular pedicle Dr Frank Gaillard.jpg|Meningioma with vascular pedicle<ref name="r">Image courtesy of Dr Frank Gaillard [http://www.radiopaedia.org Radiopaedia](original file [http://radiopaedia.org/images/13090 "here"]). [http://radiopaedia.org/licence Creative Commons BY-SA-NC] </ref>
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| MRI meningioma falx Dr Hani Al Salam.jpg|Meningioma falx<ref name="r">Image courtesy of Dr Hani Al Salam [http://www.radiopaedia.org Radiopaedia](original file [http://radiopaedia.org/images/303566 "here"]). [http://radiopaedia.org/licence Creative Commons BY-SA-NC]</ref>
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| MRI invasive meningioma Dr Bita Abbasi.jpeg|Invasive meningioma<ref name="r">Image courtesy of Dr Bita Abbas [http://www.radiopaedia.org Radiopaedia](original file [http://radiopaedia.org/cases/meningioma-invasive-1 "here"]). [http://radiopaedia.org/licence Creative Commons BY-SA-NC]</ref>
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| ==References== | | ==References== |
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
- Isointensity to slight hypointensity relative to grey matter
- Extensive dural thickening in meningioma en plaque
- Uniform low signal intensity in microcystic meningiomas
- Isointensity to slight hyperintensity relative to grey matter
- Calcification showing as areas of low signal intensity
- High signal intensity in microcystic meningiomas
Gallery
References
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