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Question
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Which of the following MRI Imaging feature suggests aggressive behavior/ higher grade of meningioma?
Explanation
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85% are considered benign<br>3 general location categories are : skull base, calvarium and membrane between hemispheres<br>Classically, they exhibit avid contrast enhancement on MRI with associated dural tail.<br>Benign meningiomas typically grow at 1-2mm per year.<br>Radiographic features associated with more aggressive behavior include large tumor size, growth rate exceeding 2mm,irregular shape, intratumoral heterogeneity with central necrosis or hemorrhage, ill defined tumor brain interface , extent of peritumoral edema and location.<br>Location- Tumors of midline anterior skull base almost exclusively benign whereas falcine and parasagittal being of higher grade.<br>Multiple enhancing pachymeningeal foci like studding of meningiomas- meningiomatosis- malignant behavior and rapid growth potential.
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Reference
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Continuum : Neuroimaging (February 2023, Volume 29,no 1) Imaging of skull base tumors. Page 158-162
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Option 1
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Is Correct (Option 1):
Midline anterior skull base location
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Option 2
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Is Correct (Option 2):
Growth rate of 1-2 mm per year
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Option 3
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Is Correct (Option 3):
Falcine / parasagittal location
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Option 4
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Is Correct (Option 4):
Exhibit avid contrast enhancement
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