CDKN2A and cancer: Two gain regions contained the well-known oncogenes EGFR (7p11.2) and CCND1 (11q13.3) and several known cancer suppressor genes, such as FHIT (3p14.2–p12.1), FAT1 (4q35.1), CDKN2A (9p21.3), and ATM (11q22.3–q24.3), reside within the 10 deletion regions.