===== Radiographic features =====

see [[Intraventricular tumor diagnosis]].
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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]] 
((Pereira B, de Almeida A, Paiva W et al. Natural history of intraventricular meningiomas: systematic review. (2020) Neurosurgical review. 43 (2): 513-523)).