The skull base refers to the base of the cranium, the part of the skull on which the brain rests. Most people do not have any idea about the skull base and where it is located until they have been diagnosed with a tumor there. It is made up of five bones fused together, separating the brain from the ears, eyes, sinuses, and other parts of the head. The bones that form the skull base are ethmoid bone, occipital bone, sphenoid bone, a pair of temporal bones, and a pair of frontal bones. The skull base is a complex part of the human body and there is a number of openings in the skull base to allow blood vessels and nerves to pass through the brain. The skull base lesions are also called tumors. It is an abnormal growth that can form directly below the skull base or in the base of the skull. Most are non-cancerous and grow slowly over time. In some rar...