While the Neural subgroup had mutations in many of the same genes as the other groups, the group did not stand out from the others as having significantly higher or lower rates of mutations. The Neural group was characterized by the expression of several gene types that are also typical of the brain’s normal, noncancerous nerve cells, or neurons. Patients in the Neural group were the oldest, on average. They also had some improvement in survival after aggressive treatment, but not as much as the Classical and Mesenchymal groups.