Meningioma treatment in iran
What is Meningioma?
A meningioma is a tumour that develops from the meninges, the membranes enveloping the brain and spinal cord. Although it may pressure the surrounding brain, nerves, and veins, a meningioma is not a brain tumour. The most common type of tumour that develops in the head is meningioma.
The majority of meningiomas develop relatively slowly. They may develop without showing any symptoms over many years. However, they may sometimes seriously impair surrounding brain tissue, nerves, or arteries.
Brain meningioma growth site
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Inside the skull or base of the skull
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The wall of the brain or spinal cord
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In the optic nerve sheath (the nerve that connects the eye to the brain)
The following are the three types of meningiomas
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Grade 1 (Benign or typical) meningioma has the slowest rate of growth and is non-cancerous.
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Grade 2 (atypical) is not extremely cancerous. But, it may develop into a serious condition in future
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Grade 3 is the most potent of all the grades and quite aggressive.
What are the Types of Meningioma?
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Convexity meningioma grows on the brain’s surface directly under the skull, accounting for approximately 20% of meningiomas. They may only present symptoms once the tumor becomes large enough to push on the brain.
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Intraventricular meningioma forms in the brain where cerebrospinal fluid (CSF) is made and distributed. It may cause a blockage of CSF flow, leading to hydrocephalus.
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Falcine and parasagittal meningioma form in or next to the falx (a thin layer of tissue between the two sides of the brain).
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Skull base meningioma grows in the bones forming the bony ridge behind the eyes and the bottom of the skull.
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Sphenoid wing meningioma constitutes approximately 20% of meningiomas and forms on the skull base behind the eyes.
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Olfactory groove meningioma accounting for around 10% of meningiomas, forms along the nerves between the brain and nose. It can cause a loss of smell and vision issues.
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Posterior fossa / petrous meningioma accounting for around 10% of meningiomas, forms on the underside of the brain. While pressing on the cranial nerves causes facial and hearing problems.
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Suprasellar meningioma arises from the skull base near the pituitary gland and the optic nerve. It can cause visual problems and pituitary gland dysfunction.
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Recurrent meningioma: When a meningioma recurs, it may be the same grade or a more aggressive or malignant form.