Morphologic response to treatment with iadademstat. (A) Representative images of blood smears showing morphologic differentiation from patient 28 (top) at screening (left) and cycle 1(C1), day 21 (D21) (right) and patient 31 (bottom) at screening (left) and C1D14 (right; two images from the same slide and patient are shown, separated by a dotted line). Charts show results of morphologic analysis of (B) blood smears and (C) bone marrow smears from selected MLL-translocated patients in the extension cohort (EC). HB, hemoglobin; WCC, white cell count; PLT, platelets.