A pediatric-inspired regimen for adolescent and adult patients with Philadelphia chromosome-negative acute lymphoblastic leukemia: a prospective study from China.
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Several international centers have used and reported on pediatric-inspired regimens to treat adolescent and adult patients with Philadelphia chromosome-negative acute lymphoblastic leukemia (Ph- ALL). However, there is a lack of prospective data from the Chinese population. We performed a prospective study with a pediatric-inspired regimen (IH-2014 regimen) to treat adolescent and adult Ph- ALL patients in our center. From 2014 to 2021, a total of 415 patients aged between 14 and 65 years (median age, 27 years) were included in this study. After a median follow-up of 40.8 months, the 5-year overall survival, disease-free survival, and event-free survival rates were 53.8%, 51.1% and 45.0%, respectively. The regimen was generally well tolerated and safe, and the overall chemotherapy-related mortality was 3.6%. Age ≥40 years and persistent detectable minimal residual disease (MRD) after induction were independent prognostic factors. Traditional risk factors for adult patients combined with post-induction MRD had predictive significance for survival and relapse, which is helpful in the selection of subsequent treatment. Patients with high-risk factors who can achieve a deep MRD response after induction do not derive benefit from allogeneic hematopoietic stem cell transplantation.