CSF2 and leukemia: Granulocyte–Macrophage Colony-Stimulating Factor (GM-CSF) and Prostaglandin-E1 (PGE-1) (“Kit M”) convert blasts in patients’ whole blood (WB) into leukemia-derived dendritic cells (DCleu), enabling leukemia-specific immune reactivation after mixed lymphocyte culture (MLC).