Related Experiment Video
Updated: Aug 22, 2026
Microvascular Decompression: Salient Surgical Principles and Technical Nuances
Published on: July 5, 2011
Meningiomas of the velum interpositum: surgical considerations
Alan P Lozier1, Jeffrey N Bruce
1Department of Neurosurgery, The Neurological Institute of New York, College of Physicians and Surgeons, Columbia University, New York, New York 10032-3784, USA. AL466@columbia.edu
Abstract:
Meningiomas of the third ventricle are a rare subtype of pineal region tumor that arise from the posterior portion of the velum interpositum, the double layer of pia mater that forms the roof of the third ventricle. The authors review the literature concerning these meningiomas and present a case in which the lesion was resected via the supracerebellar-infratentorial approach. The relationship of the tumor to the deep venous system and the splenium of the corpus callosum guides the selection of the most advantageous surgical approach. Posterior displacement of the internal cerebral veins demonstrated on preoperative imaging provides a strong rationale for use of the supracerebellar-infratentorial approach.
Insights
Meningiomas of the third ventricle, a rare pineal region tumor, can be effectively resected using the supracerebellar-infratentorial approach. Preoperative imaging showing internal cerebral vein displacement supports this surgical strategy for optimal outcomes.
Area of Science:
- Neurosurgery
- Neuro-oncology
- Skull Base Surgery
Background:
- Meningiomas of the third ventricle are rare tumors originating from the velum interpositum.
- These tumors pose surgical challenges due to their location near critical neurovascular structures.
Observation:
- The study reviews existing literature on third ventricular meningiomas.
- A case presentation details resection via the supracerebellar-infratentorial approach.
Findings:
- The supracerebellar-infratentorial approach is presented as an effective surgical option.
- Tumor relationship to the deep venous system and splenium of the corpus callosum is crucial for surgical planning.
Implications:
- Posterior displacement of internal cerebral veins on imaging indicates suitability for the supracerebellar-infratentorial approach.
- This approach offers a viable strategy for managing these rare intracranial neoplasms.