There are no previous data on CCL2, CCL3 or CCL4 in PitNETs, but these chemokines are involved in tumour growth and invasion in other tumours [5, 41], as well as in immune cell chemotaxis in cancer [5, 12, 16, 41, 43, 63, 72, 92]. The gene discussed is CCL2; the disease is neoplasm.