" The skull base implies the base or floor of the cranium, the part of the skull on which the brain rests. It consists of five bones, separating the brain from the paranasal sinuses, ears, eyes, and other parts of the head. These bones are: Ethmoid bone, which divides the nasal cavity from the brain Sphenoid bone, a complex bone that constitutes the skull base and the sides of... https://bestheadneckcancersurgeoninvizag.com/skull-base-cancers/