Intraventricular meningioma

Case contributed by Aruna Pallewatte


Headache and light headedness for two years.

Patient Data

Age: 50 years
Gender: Female

There is a high attenuation lesion with foci of calcification and homogenous enhancement following IV contrast (not shown).


A well defined oval shaped homogeneous solid lesion noted in the trigone of right lateral ventricle which is iso-signal to  the grey matter in T1W, T2W and FLAIR images . Post contrast sequences demonstrate avid homogenous enhancement.
No significant mass effect and no extraventricular invasion. No evidence of hydrocephalus in this study.

Case Discussion

Intraventricular meningiomas are rare intracranial tumors even though it is known to be one of the commonest intraventricular neoplasms in adults. Histologically intraventricular meningiomas commonly belong to the fibroblastic variety. These are usually benign and rarely are malignant with tendency to metastasize. The commonest age of presentation is between the 4th and 6th decades of life with a slightly higher incidence in females.

In the absence of dura within ventricles, intraventricular meningiomas are thought to arise from mengingothelial inclusion bodies in the tela choroidea and the choroid plexus.

The commonest locations are the trigone of the lateral ventricles which was seen in this case. They rarely occur near the foramen of Monro and the frontal horns.

Contributed by Dr Aruna Pallewatte and Dr Perumal Udayakumaran. 

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