Definition: A meningioma is a tumor that grows from the lining around the brain. The World Health Organization classifies meningiomas as grade I (benign), grade II (atypical) or grade III (anaplastic) based on how quickly the tumor cells are dividing. The majority of meningiomas are benign and grow very slowly.
Symptoms: Symptoms that occur due to meningiomas depend on their location and how much pressure they exert on the brain. Many meningiomas are asymptomatic and are incidentally discovered on imaging of the head done for unrelated reasons such as after a head injury.
Evaluation: Meningiomas are evaluated with an MRI or a CT scan.
Follow-up: The recurrence rate of benign meningioma’s that are completely removed during surgery is approximately 4%. The recurrence rate for partially removed meningiomas is higher. The recurrence rate of atypical and anaplastic meningiomas is the highest. All patients must have regular follow-up MRI’s or CT scans of the brain after removal. How often will be determined according to the grade of the tumor and how much of the tumor was removed.