Liposomal Mitoxantrone Plus Azacitidine and Venetoclax in Newly Diagnosed Elderly or Unfit AML

This prospective, open-label, multicenter phase Ib trial will evaluate the safety, tolerability, and RP2D of the VAM regimen (liposomal mitoxantrone + azacitidine \[AZA\] + venetoclax \[VEN\]) in elderly or unfit patients with newly diagnosed AML. A standard 3+3 dose escalation will enroll 12-30 patients, testing liposomal mitoxantrone at 8, 12, 16, and 20 mg/m². VEN duration (9 vs. 14 days) will be determined at the 8 mg/m² dose level, after which only liposomal mitoxantrone will be escalated while AZA and VEN will remain fixed. Induction therapy will consist of up to two 28-day cycles. Responders achieving CR/CRi/MLFS will be eligible for up to 4 consolidation cycles (total ≤6 cycles), after which they will proceed to maintenance with either AZA+VEN or observation.