Meningioma is a type of tumor that forms in the meninges, the protective membranes covering the brain and spinal cord. These tumors are usually benign, meaning they are not cancerous, but they can still cause problems by pressing on nearby brain structures. Meningiomas can vary in size and may grow slowly over time. Symptoms of meningioma can include headaches, seizures, and changes in vision or hearing, depending on the tumor's location. Diagnosis typically involves imaging tests like MRI or CT scans. Treatment options may include surgery, radiation therapy, or monitoring, depending on the tumor's size and symptoms.