What are brain tumors?
Brain tumors are rare — less than 1 percent of the population is diagnosed with a malignant (cancerous) brain tumor during their lifetime. Cancers that begin in the brain – primary brain tumors – are uncommon, while those that travel to brain tissue from other organs – called metastatic tumors – are more frequently diagnosed.
In 2016, around 78,000 people in the United Stated will be diagnosed with a primary brain tumor — most of which will be benign (noncancerous) — and approximately 200,000 will be diagnosed with brain tumors that metastasized from other parts of the body. The most common cancers that metastasize to the brain include: