A calcified meningioma is a type of brain tumor that originates in the meninges, the layers of tissue covering the brain and spinal cord. Calcification refers to the accumulation of calcium salts within the tumor, which can make it appear denser on imaging studies such as CT scans or MRIs. Most meningiomas, including calcified ones, are benign (non-cancerous) and slow-growing. They often do not cause symptoms and may be found incidentally during imaging studies for other reasons. Some meningiomas can grow over time. Their location and size can sometimes compress adjacent brain structures and cause symptoms such as headaches, seizures, vision problems or neurological deficits. A small percentage of meningiomas can be atypical or malignant, which means they grow more aggressively and may require more intensive treatment.