CDKN2A and nerve sheath neoplasm: No chromosomal copy number aberrations were present beyond monosomy/loss of 22q (Supplementary Table S2), and no other genetic alterations characteristic of nerve sheath tumors were identified involving NF1, NF2, SMARCB1, LZTR1, ERBB2, TRAF7, CDKN2A, TP53, SUZ12, EED, PRKAR1A, or VGLL3 [6, 17].