From the pathological point of view, a total of 15 pilocytic astrocytomas (PA, of which 11 were with the KIAA1549-BRAF transcript and 4 without), 4 gangliogliomas (GG, 2 with BRAF v600e and 2 without), and 1 each of glial tumor of the optic pathways KIAA1549-BRAF, epileptogenic oligoid tumor CD34+, and angiocentric glioma BRAF+ were included. This evidence concerns the gene KIAA1549 and ganglioglioma.