What is brain metastasis?

Updated: Aug 01, 2018
  • Author: Victor Tse, MD, PhD; Chief Editor: Nicholas Lorenzo, MD, MHA, CPE  more...
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Answer

Brain metastases are cancer cells that have spread to the brain from primary tumors in other organs in the body (see the image below). Metastatic tumors are among the most common mass lesions in the brain. An estimated 24-45% of all cancer patients in the United States have brain metastases. [1]

Multiple brain metastasis in a patient with known Multiple brain metastasis in a patient with known non-small cell lung adenocarcinoma. There was also systemic disease in the liver.

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