The population was very poor-risk, including 8 pts (80%) with adverse-risk cytogenetics, 3 pts (30%) with prior hypomethylating (HMA) exposure, and 4 pts (40%) with TP53 mutation. CR/CRis were seen across disease subgroups, including in 2/3 pts with prior HMA exposure, 3/4 pts with TP53 mutation...The combination of azacitidine, venetoclax and pevonedistat is safe and shows encouraging preliminary efficacy in a very high-risk population of pts with s-AML.