Meningiomas of the lateral ventricle

Area of Science:

• Neurology
• Neurosurgery
• Oncology

Background:

• Meningiomas are typically slow-growing tumors arising from the meninges.
• Lateral ventricle meningiomas are rare and can present with varied clinical manifestations.
• Cerebral ischemia is a common neurological emergency with distinct diagnostic criteria.

Observation:

• Two cases of large meningiomas located in the lateral ventricles are described.
• Initial diagnosis in both cases was cerebral ischemia, indicating a diagnostic challenge.
• Neither tumor caused symptoms of increased intracranial pressure.
• Classic meningioma symptoms such as hemianopia and papilledema were absent in both patients.

Findings:

• The meningiomas likely originated from the tela conjunctiva of vessels, rather than the choroid plexus.
• Atypical presentation of lateral ventricle meningiomas can mimic other neurological conditions.
• Delayed diagnosis is a potential risk due to non-specific or absent typical symptoms.

Implications:

• Highlights the importance of considering rare diagnoses in cases of suspected cerebral ischemia with atypical features.
• Suggests the need for advanced neuroimaging to differentiate meningiomas from ischemic events.
• Emphasizes the variability in meningioma presentation and the potential for diagnostic delays.