For most patients, the diagnosis of brain cancer is still a big shock and a death sentence. Because only about 40 percent of them survive the next two years after a malignant cancer is found. In addition, new forms of therapy have been decades in coming. Contrary to expectations, the discovery of the Nobel Prize-winning immune checkpoint inhibitors in the 1900s was also unsuccessful in treating brain tumors. So far, doctors can only use surgery, radiation and a single approved chemotherapy drug to help patients.