Approximately 20 to 40 percent of people with cancer will develop brain metastasis as a complication from their primary/original cancer. This is equivalent to more than 200,000 people per year in the United States alone. The rates of brain metastasis have been steadily rising as cancer treatments have improved over the last decade. People are living longer, giving more time for cancer to spread to the brain.
Advances in medical imaging technologies enable clinicians to visualize the brain in greater detail, leading to increased detection of brain metastasis. Cancers that commonly metastasize to the brain include lung, breast, melanoma, kidney, and colon cancers.