These include established activating FGFR mutations, FGFR1 N546K and K656E in low-grade (LGG) and high-grade glioma (HGG), neuroblastoma, medulloblastoma, glioblastoma, and Wilms tumour, and FGFR4 N535K/D and V550L/E in RMS [11, 12, 41, 42, 49, 54–57]. The gene discussed is FGFR1; the disease is neuroblastoma.