The common types of meningiomas are convexity, falcine, parasagittal and intraventricular, according to Johns Hopkins Medicine. Other types that form in the bones in the lower section of the skull include sphenoid wing, olfactory grove, posterior fossa and suprasellar meningioma.
A meningioma is a tumor that forms on the three layers of membrane covering the brain and spinal cord inside the skull, states WebMD. The risk factors for developing a maningioma include exposure to radiation and neurofibromatosis. The symptoms develop gradually and include headaches, seizures, blurred vision, numbness, weakness in arms and legs and speech problems. Among the treatment options are craniotomy and radiation.