Cancer Types And The Cells They Originate From

Meningioma

Meningioma is a tumor that develops in the cells that make up the meninges, the layers of tissue encapsulating the spinal cord ad brain. Meningiomas are most likely to develop in the arachnoid cells in the meninges. Grade I meningiomas are benign and tend to grow slowly, grade II meningiomas are quicker growing and contain atypical cells, and grade III meningiomas are malignant and metastasize to other parts of the body quickly. The most prevalent locations where meningiomas are found include the top outer surface of the brain and at the base of the skull. Sphenoid meningiomas develop on the sphenoidal ridge behind the eyes, olfactory groove meningiomas develop near the nerves that connect the brain to the nose, suprasellar meningiomas develop near the pituitary gland, and spinal meningiomas develop in the spine at chest level. The symptoms of a meningioma depend on which part of the central nervous system is being affected by the growing tumor.

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