CXCL9 and cancer: CXCL9, CXCL10, and CXCL11 (C-X-C motif chemokine ligand 9, 10, and 11, respectively) are chemokines that share functions as ligands of CCR3, stimulating antitumoral immunity, but they can also promote proliferation and metastasis in cancer cells in an autocrine pathway, as recently reviewed (Tokunaga et al., 2018).