RecruitingPhase 1Drug trialEganelisib as Monotherapy and in Combination With Cytarabine in Relapsed/Refractory AMLThis is a Phase 1b open-label, multicenter, dose-escalation and dose-optimization study designed to evaluate the safety, tolerability, pharmacokinetics (PK), pharmacodynamics (PD), and anti-tumor efficacy of eganelisib as monotherapy and in combination with cytarabine in patients with relapsed/refractory (r/r) acute myeloid leukemia (AML) or r/r higher-risk myelodysplastic syndromes (HR-MDS). The study consists of 2 parts: * Part 1: Dose Escalation (DE) in both monotherapy and in combination. * Part 2: Dose Optimization