How Do Primary and Secondary Brain Tumors Differ?
A: Primary brain tumors originate from cells within the brain, but seldom travel outside of the brain and into other parts of the body. Secondary brain tumors (also called metastatic brain cancer) occur when cancer develops in another part of the body and metastasizes (spreads) to the brain. Metastatic brain tumors are typically more common than primary
—Dr. James (Jim) Robinson, MD, of Brain Expert, PC