A clinical trial to find a safe and suitable dose of idasanutlin, and to see how well idasanutlin works when given with chemotherapy or venetoclax, in children and young adults with leukemia or solid tumours

A Study Evaluating the Safety, Tolerability, Pharmacokinetics and Preliminary Activity of Idasanutlin in Combination With Either Chemotherapy or Venetoclax in Treatment of Pediatric and Young Adult Participants With Relapsed/Refractory Acute Leukemias or Solid Tumors