This shows that it is possible to use Optune even in kids as young as 4 years old. This study was designed to show that it can be done. Now they have to try it at the right time to see how well it works. They chose heavily pretreated kids who were out of options and used this as a last resort, which is not the best time to use it. I feel it should be used right at the start, when it had the best chance of helping - as the large newly diagnosed gbm study showed compared to the recurrent gbm study.