Deregulation of the EVI1 oncogene is a key transforming event in the development of many malignancies, most prominently very high-risk acute myeloid leukemia (AML), ovarian, colon, breast, non-small cell lung cancer, and soft-tissue sarcoma. For decades, both EVI1 function and the mechanism underlying its deregulation have been poorly understood. The consequent lack of a targeted therapy against E...