Case of the Week
Section Editors: Matylda Machnowska1 and Anvita Pauranik2
1University of Toronto, Toronto, Ontario, Canada
2BC Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
Sign up to receive an email alert when a new Case of the Week is posted.
July 15, 2013
Intraventricular Meningioma
- Although rare among all intracranial meningiomas, it is the most frequent intraventricular mass in adults; in children, intraventricular meningioma suggests the diagnosis of neurofibromatosis type II.
- Often asymptomatic, they occasionally present with non-specific signs related to the mass effect (headache, dizziness, etc).
- Key Diagnostic Features: Well defined lobulated mass, often within the atrium of the ventricles. Typically hyperdense on non-contrast CT, and often associated with calcification. Dark T2 signal and marked signal dropout on DWI is seen. Moderate-to-intense enhancement is seen. Alanine peak on short TE spectroscopy aids in making the diagnosis. Cystic changes may occasionally be seen. No hydrocephalus is noted.
- DDx: Less than 10 years old: choroid plexus papilloma; 10-40 years old: ependymoma, oligodendroglioma, low grade astrocytoma; greater than 40 years old: meningioma, metastasis, and lymphoma
- Rx: Observation, surgery, RT
Current Issue
Case Collections
