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Meningioma Symptoms and Causes

Meningiomas are usually benign tumors that come from the tough outer covering of the brain just under the skull, known as meninges or dura. This type of tumor accounts for about one-third of brain tumors in adults. They are slow-growing and may exist for years before being detected. Meningiomas are most common in older patients, with the highest rate in people in their 70s and 80s. They are commonly found in the cerebral hemispheres just under the skull. They usually are separate from the brain and can sometimes be removed entirely during surgery. They can, however, recur after surgery and certain types can be malignant. Meningioma symptoms may include changes in vision (seeing double or blurriness), headaches that worsen over time, hearing loss, memory loss, seizures and weakness in the arms and legs. Meningioma causes are unknown.