AXL and cancer: Increasing studies have demonstrated the vital roles of TAM receptor-ligand complex in inflammation, immunity, and cancer (Burstyn-Cohen & Maimon, 2019; Carrera Silva et al., 2013; Paolino et al., 2014; Paolino & Penninger, 2016; Rothlin et al., 2015), with the roles of TAM receptor AXL in PTC being proved by several independent research teams.