Metastatic Brain Tumors
What Is It?
A metastatic brain tumor is cancer that has spread (metastasized) from another part of the body to the brain. It is also called a secondary tumor, lesion or brain metastasis (plural: metastases). In contrast, a primary brain tumor starts in the brain, not in another part of the body.
A tumor is an abnormal mass of tissue. It occurs when cells divide more than they should or don't die when they should.