While generally non-cancerous, a benign meningioma can pose serious health risks depending on its size, location and rate of growth. If a benign meningioma grows large enough, it can exert pressure on the brain or spinal cord, potentially leading to significant neurological symptoms and complications, such as headaches, vision problems, seizures and changes in behavior or cognitive function. In some cases, if the tumor is left untreated, it can lead to life-threatening situations due to increased intracranial pressure or brain herniation.