Meningiomas are the second most common primary neoplasm of the central nervous system, arising from the arachnoid "cap" cells of the arachnoid villi in the meninges. These tumors are usually benign in nature; however, they can be malignant.
Small tumors (e.g., < 2.0 cm) are usually incidental findings at autopsy without having caused symptoms. Larger tumors can cause symptoms depending on the size and location.
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Small tumors (e.g., < 2.0 cm) are usually incidental findings at autopsy without having caused symptoms. Larger tumors can cause symptoms depending on the size and location.
- Focal seizures may be caused by meningiomas that overlie the cerebrum.
- Progressive spastic weakness in legs and incontinence may be caused by tumors that overlie the parasagittal frontoparietal region.
- Sylvian tumors may cause myriad motor, sensory, aphasic, and seizure symptoms, depending on the location.
- Increased intracranial pressure eventually occurs, but is less frequent than in gliomas
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