Brain Cancer
Brain Cancer Primary brain cancer refers to malignant tumors that form either in the brain or in the nerves originating in the brain.Brain cancer does not frequently spread ( metastasize ) to outside of the central nervous system (CNS). The CNS is the part of the nervous system that includes the brain and spinal cord.Primary brain cancer makes up 2% to 3% of all new cancer cases in adults and is the second most common form of childhood cancer (after leukemia ). Primary brain cancer is the leading cause of cancer deaths in children and is the third most common cause of cancer deaths in adults aged 15 to 34. Secondary brain cancer refers to malignant tumors that originated elsewhere but have spread (metastasized) to the brain. Examples include, but are not limited to, breast cancer and lung cancer that have metastasized to the brain. Secondary brain cancer is more common than primary brain cancer. Brain cancer rates are found t...