Quiz Form
Question Date: 18/01/2024
Question: Which of the following MRI Imaging feature suggests aggressive behavior/ higher grade of meningioma?
Options:
- Midline anterior skull base location
- Growth rate of 1-2 mm per year
- Falcine / parasagittal location
- Exhibit avid contrast enhancement
Correct Answer: Falcine / parasagittal location
Explaination: 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.
Reference: Continuum : Neuroimaging (February 2023, Volume 29,no 1) Imaging of skull base tumors. Page 158-162