What causes brain cancer?

Brain tumor. brain tumor can form in the brain cells (as shown), or it can begin elsewhere and spread to the brain. As the tumor grows, it creates pressure on and changes the function of surrounding brain tissue, which causes signs and symptoms such as headaches, nausea and balance problems. read more

Brain cancer is an overgrowth of cells in your brain that forms masses called tumors. Cancerous, or malignant, brain tumors tend to grow very quickly. They disrupt the way your body works, and this can be life-threatening. read more

Causes of Brain Cancer As with tumors elsewhere in the body, the exact cause of most brain cancer is unknown. Genetic factors, various environmental toxins, radiation to the head, HIV infection, and cigarette smoking have all been linked to cancers of the brain. read more