In Phase Ia, pts received one of two BI 907828 dosing schedules: Arm A, day 1 of 21-day cycles (q3w); Arm B, days 1 and 8 of 28-day cycles. During Phase Ib (dose expansion), pts were enrolled to Cohort 1 (TP53wt, MDM2-amplified sarcoma) or Cohort 2 (other TP53wt, MDM2-amplified solid tumors)....BI 907828 demonstrated a manageable safety profile overall and encouraging preliminary efficacy was seen in pts with advanced MDM2-amplified DDLPS...