see Intraventricular tumor diagnosis.

On the brain MRI with and without contrast, intraventricular meningioma appears as a solid, well-circumscribed mass, iso- or hypointense on T1 and T2-weighted images, and showing homogeneous contrast enhancement.

Their signal and attenuation characteristics are the same as other meningiomas, demonstrating essentially isodense and intensity to grey matter precontrast and vivid, usually homogeneous enhancement following administration of contrast. Compared to extra-axial meningiomas, a greater proportion is calcified (50% compared to 20% for standard meningioma).

The vascular supply depends on the location but generally is from the arterial supply of the adjacent choroid plexus ¹⁾.