A meningioma is a type of brain tumor that develops in the meninges — the protective layers covering the brain and spinal cord. Most meningiomas are benign (non-cancerous) and grow slowly, but in some cases, they can be atypical or malignant, leading to faster growth and severe health issues. Even though meningiomas are the most common type of primary brain tumor, many people don’t realize they have one until it grows large enough to cause symptoms.

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