TP53 and Mobius syndrome: Given the enhanced expression of apoptotic and cell cycle inhibition pathways in L807mts-treated cells and prior reports that have indicated TP53-mutated Wnt MBs to be more radiosensitive than TP53-mutated non-Wnt MBs4,5, we investigated the potential to radiosensitize treatment-refractory MBs with L807mts.