AXL and neoplasm: Fourthly, a spectrum of RTKs/nRTKs, comprising PDGFR, VEGFR, FGFR-1, EGFR, AXL, Src, and c-Kit, have been implicated in inducing TNBC cell invasion and migration, and enhancing exit from the primary tumor microenvironment [2, 50, 53, 55, 60, 68, 71].