ENTPD2 and hepatocellular carcinoma: In hepatocellular carcinoma, these myeloid-derived cells can be accumulated in the hypoxic TME through C–C motif chemokine ligand 26 (CCL26) (Chiu et al. 2016) or through ectonucleoside triphosphate diphosphohydrolase 2 (ENTPD2) (Chiu et al. 2017).