CSF2 and neoplasm: For example, (i) cytokines with chemotactic properties are called chemokines; (ii) cytokines produced by one leukocyte and acting on other leukocytes are known as ILs; (iii) cytokines with the ability to kill or inhibit tumor cells are referred to as TNF; (iv) cytokines that promote distinct stages of development and differentiation in pluripotent hematopoietic stem cells are called colony-stimulating factor (CSF); and (v) cytokines that can act by preventing lymphocyte proliferation are called transforming growth factor (TGF) [39].