ATRX and subependymal giant cell astrocytoma: Furthermore, sequencing of three subependymal giant cell astrocytoma (SEGA)-like astrocytomas in NF1 mutant patients with ALT and intact ATRX have revealed genetic alterations in RECQL4, Fanconi anemia complementation group genes (FANCD2, FANCF, and FANCG), and SMARCAL1 [119].