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.^[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