Real‐world outcomes of venetoclax plus hypomethylating agents in unfit acute myeloid leukaemia: Results of the GIMEMA AML2320 trial

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Venetoclax (VEN) plus hypomethylating agents (HMAs) represents the standard of care for newly diagnosed acute myeloid leukaemia (AML) patients unfit for intensive chemotherapy, but prospective real-world observational data outside randomized clinical trials remain limited. The Gruppo Italiano Malattie Ematologiche dell'Adulto (GIMEMA) AML2320 is a prospective, multicentre, observational study (NCT04589728) including 193 newly diagnosed unfit AML patients receiving VEN plus azacitidine or decitabine between November 2020 and December 2021. Primary end-point was overall survival (OS); secondary end-points included composite complete remission (cCR), disease-free survival and safety. Median age was 74 years with 42% of patients being ≥75 years. After completing cycle 4, cCR was achieved in 73% of the patients, with 54% responding before cycle 2. After a median follow-up of 23 months, median OS was 13.0 months. cCR achievement within cycle 4 correlated with longer OS (19.1 vs. 9.1 months, p = 0.001). Patients receiving 400 mg VEN without azoles had improved OS compared with those on reduced doses with azoles (18.2 vs. 11.4 months, p = 0.015). An anchored matching-adjusted indirect comparison with the phase III VIALE-A trial (NCT02993523) showed comparable median OS (14.8 months vs. 14.9 months; p = 0.6). The GIMEMA AML2320 trial confirmed the efficacy of VEN/HMAs in a prospective, real-world unfit population. Early remission was associated with improved outcomes.

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