They block the flow of cerebrospinal fluid causing hydrocephalus, headaches and dizziness. Intraventricular meningiomas: grow inside the fluid-filled ventricles of the brain.Foramen magnum meningiomas: grow where the spinal cord connects to the brain they can cause headaches, brainstem compression, and difficulty walking.Petroclival tumors can compress the trigeminal nerve, resulting in facial pain (trigeminal neuralgia) or spasms of the facial muscles. These tumors can compress the cranial nerves causing facial symptoms or loss of hearing. Posterior fossa meningiomas: grow along the underside of the brain near the brainstem and cerebellum.cavernous sinus, or carotid arteries) as well as the cranial nerves, making them difficult to completely remove. They often encase major blood vessels (e.g. These tumors can cause visual problems, loss of sensation in the face, or facial numbness. Sphenoid meningiomas: grow along the bony ridge behind the eyes.Tuberculum sella meningiomas: grow near the pituitary gland and optic nerves.They can also compress the optic nerves, causing visual problems or even blindness. They can compress the frontal lobes causing personality changes that may be mistaken for depression. Olfactory groove meningiomas: grow along the nerves that run between the brain and the nose and often cause a loss of smell.Symptoms may include personality changes, headache, vision problems, and arm or leg weakness. The falx contains two large blood vessels (sinuses) that can make surgical removal more difficult. Falx and parasagittal meningiomas: grow from the dura fold that runs between the left and right sides of the brain.Symptoms may include seizures, neurological deficits, or headaches. They may not produce symptoms until they reach a large size. Convexity meningiomas: grow on the surface of the brain.Meningiomas are named according to their location (Fig. Weakness in the arms or legs, or loss of sensation, may occur with spinal cord meningiomas. They often first appear as headaches and seizures, caused by increased pressure of the growing tumor. Symptoms of a meningioma vary by the location and size of the tumor. The tumor may be found incidentally on an MRI or CT scan performed for another reason. Some people with meningiomas have no symptoms. Meningiomas grow slowly and may not cause symptoms for years. If the tumor recurs, chemotherapy is used. Surgery is the first line of treatment, followed by radiation. Malignant meningiomas account for less than 1% of all meningiomas. Grade III, malignant meningiomas are the most aggressive and are called anaplastic.Some will require radiation after surgery. Grade II, atypical meningiomas are slightly more aggressive in growth than Grade I and have a slightly higher risk of recurrence. Patients who undergo incomplete removal may need radiation after surgery. Patients who undergo complete removal of a grade I meningioma usually do not require additional treatment. If there is a chance the tumor will grow enough in your lifetime to cause symptoms, then surgical removal may be recommended. If the tumor is not causing symptoms, it may be best to observe its growth over time with periodic MRI scans.
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