C/EBPδ is expressed by differentiated granulocytes/neutrophils, with a specific role in emergency myelopoiesis under tumor conditions (23, 24, 50, 51), and a recent study suggested that C/EBP-δ positively regulates MDSC expansion and endothelial VEGFR2 expression in tumor development (50). Here, KDR is linked to neoplasm.