Published: Sept. 2, 2011
Updated: Sept. 2, 2011
No formal staging system exists for brain tumors because they almost never spread to other parts of the body. Their main danger is their ability to disrupt vital operations of the brain, which are essential to all the body’s major functions.
Brain tumors are assigned grades according to how fast they grow and how different-from-normal their cells look to a pathologist examining them under a microscope.
Grades indicate how fast the tumor is likely to grow and how abnormal the cells look under a microscope when a pathologist examines them. Grades range from I (low) to IV (high).
Factors that influence the outcome of a brain tumor include the tumor’s grade, the age of the patient, where the tumor is, and whether it has spread to other parts of the central nervous system.
Learn more about brain tumors: