CDKN2A and gangliocytoma: For example, gangliocytoma show mutations in BRAF, KRAS, RAF1, NF1 (neurofibromin 1) and CDKN2A (cyclin dependent kinase inhibitor 2A) (251) and tumors of the glia in FGFR, HRAS, BRAF and NF1 (100).