A brain tumor is also known as an intracranial tumor. A brain tumor may be benign or malignant. Benign tumors do not have the potential to metastasize, yet they may affect the functioning of the brain.
The base of the skull is that part of your head on which your brain lies. It is made of multiple bones which are fused together with sutures. It is a complex region of the brain, because all the blood vessels supplying the brain.