GAS6 and colorectal carcinoma: Likewise, the overexpression of AXL and GAS6 was shown by IHC in 76,7% and 73.5%, respectively, in 223 human CRC specimens, while the amplification of AXL gene was detected by fluorescence in situ hybridization (FISH) in 8 out of 146 cases (5,4%) of CRC samples (51).