
Ever heard of gliomas? These primary brain tumors arise within the brain, but we don't know the cell of origin. There are multiple grades of gliomas -- grade II, III and IV, with grade IV being the most malignant.
Glioblastoma multiforme is a fast-growing brain or spinal cord tumor. It affects the brain more often than the spinal cord. These tumors grow from glial cells which form the (supportive) tissue of the brain and spinal cord.
As it grows, a brain tumor can press against or damage nerves or other structures. This can interfere with the brain's normal functioning. For example, a brain tumor can disrupt:
Thought
Memory
Emotion
Movement
Vision
Hearing
Touch
Scientists do not know what causes most brain tumors. However, they are...