The causes of meningioma are not well understood, as stated by WebMD. Exposure to radiation and a genetic disorder, neurofibromatosis type 2, are prominent risk factors.Continue Reading
Meningiomas have been found near skull fractures and in locations where the surrounding membrane has been scarred, suggesting injury may also be a risk factor. Most meningiomas occur in people between the ages of 30 and 70, and women are more than twice as likely as men to develop a meningioma. This statistic may be explained by research that suggests a link between meningiomas and the female hormone progesterone, notes WebMD. While most meningiomas are benign, in rare cases a meningioma may be malignant. Some meningiomas are classified as atypical, meaning they are somewhere in between benign and malignant.
While the cause remains a mystery, doctors know that meningiomas form because something has altered the cells in the meninges. These are the membranes that form a protective barrier around the brain and spinal cord, explains the Mayo Clinic. When these cells multiply rapidly, a meningioma tumor may form. Depending on where the meningioma is located, symptoms may include changes in vision; headaches that worsen with time; loss of smell, hearing or memory; seizures; and weakness in the arms or legs.Learn more about Cancer