A meningioma is a tumor involving the meninges of the brain. The meninges is the membrane that covers the brain and spinal cord. Typically, meningiomas are benign and slow growing. Symptoms depend on the location of the tumor, but can include things like visual changes, headaches, memory loss, etc.
Treatment options include watching and waiting if appropriate, stereotactic radiosurgery, or surgical removal of the tumor. If surgery is indicated, a craniotomy is performed to access the meningioma. The surgeon then removes as much of the tumor as they can without damaging surrounding tissue. Sometimes, a part of the tumor may need to be left in the brain if it is too risky to remove. Follow up scans are often performed to monitor for possible regrowth.