Meningioma is a brain tumor that affects the cellular elements belonging to the meninges. This tumor is often benign (non-cancerous) and rarely present with a malignant phenotype. It more often affects the dura mater, especially where there are more arachnoid villi. It is a benign tumor, although it can cause compression of the brain, erode and damage bone tissue or, in rare cases, degenerate into a malignant tumor, turning into sarcoma.
This type of cancer accounts for 30% of brain tumors. It is twice as common in women, adults, and the elderly.
Their risk increases with age, and they are more likely to occur in patients who have family members with neurofibromatosis, a genetic syndrome that leads to the development of several benign tumors in the meninges and nerves.