Comparison of VA and D/IA Induction Regimens in Elderly Fit Acute Myeloid Leukemia Patients

Inclusion Criteria: * Diagnosis of AML according to WHO (2022) or ICC criteria. * Age ≥55 and ≤75 years. * ECOG performance status score of 0-2. * Adequate organ function: * Total bilirubin ≤1.5× upper limit of normal (ULN) * AST and ALT ≤2.5× ULN * Serum creatinine \<2× ULN * Cardiac enzymes \<2× ULN * Left ventricular ejection fraction (LVEF, by echocardiogram) within normal range Signed informed consent by the patient or legal representative. Exclusion Criteria: * Acute promyelocytic leukemia with PML-RARA fusion gene. * AML with RUNX1-RUNX1T1 or CBFB-MYH11 fusion genes. * AML with BCR-ABL fusion gene. * Relapsed or refractory AML (previously treated with induction chemotherapy, but hydroxyurea is allowed). * Concurrent other malignancies requiring treatment. * Active cardiac disease (e.g., uncontrolled angina, recent myocardial infarction, severe arrhythmias, uncontrolled heart failure, LVEF below normal). * Severe infectious diseases (e.g., untreated tuberculosis, pulmonary aspergillosis). * Other conditions deemed unsuitable by the investigator.