IMGN632 as Monotherapy or With Venetoclax and/or Azacitidine for Participants With CD123-Positive Acute Myeloid Leukemia

This study explores multiple IMGN632 doses in combination and monotherapy Regimens, including (A - closed to enrollment)) azacitidine, (B-closed to enrollment) venetoclax, (C) azacitidine+venetoclax, and (D- closed to enrollment) monotherapy in MRD+ AML. For combination Regimens A-C, a Phase 1b Dose Escalation Cohort will determine the recommended Phase 2 dose (RP2D) of IMGN632 in that specific combination Regimen, followed by a Phase 2 Dose Expansion Cohort for each combination Regimen to characterize the safety profile further and assess the antileukemia activity of the different combination Regimens.