AXL and metastatic carcinoma: Additionally, tumor samples collected from metastatic sites showed significantly higher expression of AXL than normal samples; whereas 85% (11/13) of metastatic carcinoma samples expressed AXL and 46% (6/13) received a score of 3, only 43% (27/63) of normal samples expressed AXL and only 5% (3/63) received a score of 3 (P=0.0001, Table 1).