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Meningiomas of the pineal region and third ventricle
Abstract:
The clinical presentation, radiological findings, and surgical management of two cases of meningioma arising from the velum interpositum without dural attachment are described. The true nature of these tumors was not suspected despite extensive preoperative diagnostic evaluation. A total removal was effected in both cases with the use of the operating microscope and a posterior fossa approach to the pineal region. A review of similar cases from the English literature is presented.
Insights
Two rare meningiomas originating from the velum interpositum were successfully removed using a posterior fossa approach. These tumors, challenging to diagnose preoperatively, highlight the need for careful surgical consideration.
Area of Science:
- Neurosurgery
- Neuropathology
- Radiology
Background:
- Meningiomas typically arise from dura mater.
- Intracranial meningiomas present with diverse clinical and radiological features.
- Velum interpositum meningiomas are exceptionally rare and challenging to diagnose preoperatively.
Observation:
- Two cases of meningioma originating from the velum interpositum without dural attachment were identified.
- Preoperative diagnostic evaluations failed to suspect the true nature of these tumors.
- Patients presented with symptoms related to the location of the tumor in the posterior fossa/pineal region.
Findings:
- Histopathological examination confirmed the diagnosis of meningioma.
- Surgical management involved total tumor removal using the operating microscope.
- A posterior fossa approach provided effective access to the pineal region for complete resection.
Implications:
- This study expands the understanding of rare meningioma locations.
- Highlights diagnostic challenges associated with velum interpositum meningiomas.
- Demonstrates the efficacy of surgical resection via a posterior fossa approach for these specific tumors.