A meningioma is a tumor which originates between the protective layers that surround the brain called the meninges. It is caused by abnormal growth of cells but the trigger for this is unknown. Most meningiomas are benign but they can be malignant. Benign means that the tumour will get bigger but it will not spread. A malignant tumour can spread to the other parts of the brain. The symptoms of a meningioma can be mild and restricted to one area or they can be more severe and widespread.
1 in 5 primary brain tumours are meningiomas. They are mostly seen in people over 40 years old and are more common in women than in men. A meningioma is diagnosed using a series of investigations such as a CT scan, MRI scan, angiogram or biopsy. The tumour is graded to give an idea how quickly it will grow. For example, a grade 1 meningioma grows slowly, is benign and does not come back following treatment. A grade 3 tumour grows quickly and often comes back after treatment. Your consultant will discuss treatment options with you.
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