NTRK3 and cancer: Conversely, the copy number gain intersection included quite a number of genes whose overexpression has previously been associated with cancer, such as BIRC5, CCND2, CDK6, HEY1, HGF, HSF1, KIT, MDM2, MET, NTRK3, PDGFR, SNAI2, TK1, and TWIST1.