Meningioma is a tumor that arises in the meninges, the membranes that surround the brain and spinal cord. Meningioma is the most common
type of tumor that forms in the head. They occur more often in women than in men.
Some meningiomas are known as atypical. These are not considered as either benign or malignant tumors. They have the possibility of becoming
malignant. A small number of meningiomas can be cancerous and have the tendency to grow quickly. They also can spread to other parts of the
brain or the body.