CSF1 and neoplasm: Interestingly, expression of colony stimulating factor 1 (CSF1), CSF2, CSF3, C-C motif ligand 2 (CCL2), CCL7, and C-X-C motif ligand 2 (CXCL2), which promote myeloid cell recruitment [222] and drive tumor progression [223], was dependent on RelB [108].