Enlarge ImageTelling tumor. A genetic mutation could help doctors diagnose deadly tumors in the brain.Credit: Photograph courtesy of Duke Photopath While survival rates for many cancers have improved over the years, brain cancers often remain stubbornly unresponsive to treatment. Now, researchers are turning to genetics and have hit on a gene mutation that can be used to differentiate between the deadliest brain cancers. The find could help doctors more accurately diagnose these devastating tumors. The most common brain tumor, glioblastoma, is also the deadliest. These tumors occur in two forms: primary, in which patients suddenly develop large and highly...