Meningioma MRI

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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.

MRI

• Brain MRI with gadolinium is the investigation of choice for the diagnosis of meningioma.
• On braim 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:

• Dural tail sign
• CSF vascular cleft sign
• Sunburst or spokewheel appearance of the vessels

• When the appearance and location of meningioma are typical, the diagnosis can be made with a very high degree of specificity.
• In the case of anaplastic meningioma, the degree of edema observed on MRI correlates with the invasion of the surrounding tissue by the tumor.
• Meningioma signal characteristics observed on MRI include:

• T1 weighted image illustrates:

• Isointense mass in 60-90% of the cases
• Hypointense mass in 10-40% of cases

• T1 C+ weighted image (image enhanced with gadolinium) usually illustrates an intense and homogeneous enhancement
• T2 weighted image illustrates:

• Isointense mass in 50% of the cases
• Hyperintense mass in 35-40% of the cases
• Hypointense mass in 10-15% of the cases

References

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