In early trial, drug shrinks tumors in majority of children with most common form of brain cancer

Day One Biopharmaceuticals reported Sunday that an experimental molecule shrank tumors by at least 50% in a majority of children with the most common form of childhood brain cancer, offering an early but rare glimmer of progress in a disease that has seen little over the last three decades. In the Phase 2 trial, 22 patients ages 3 to 18 with low-grade glioma who had progressed on at least three previous treatments were given a targeted drug called tovorafenib. Of those, 14 — or 64% — saw their tumors wither to less than half their size. Six others had stable disease.