GAS6 and breast cancer: Irrespective of the fact that Gas6-dependent Axl phosphorylation results in subsequent activation of oncogenic pathways,26 Cormack et al. 27 revealed that increased Gas6 mRNA expression was associated with favorable prognostic factors in breast cancer, and this phenomenon was also found in RCC.10 All of these aforementioned results seen in other types of tumors are concordant with the findings of our present study.