In addition, several novel adipokines have been identified, including FABP4, apelin, endotrophin, visfatin, lipocalin 2, osteopontin, ANGPTL2, omentin-1, and chemerin, the roles of which as mediators between obesity and cancer have also been reported (Cabia et al., 2016). Here, FABP4 is linked to obesity due to melanocortin 4 receptor deficiency.