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Associations between neutrophil recovery time, infections and relapse in pediatric acute myeloid leukemia

Ditte J A Løhmann1, Peter H Asdahl2, Jonas Abrahamsson3

  • 1Department of Pediatrics and Adolescent Medicine, Aarhus University Hospital, Aarhus, Denmark.

Pediatric Blood & Cancer
|May 22, 2018
PubMed

Insights

Longer neutrophil recovery time in children with acute myeloid leukemia (AML) is linked to a higher risk of severe infections and relapse. This finding may help refine risk stratification for pediatric AML treatment.

Area of Science:

  • Pediatric Hematology Oncology
  • Leukemia Research
  • Clinical Trial Analysis

Background:

  • Children with acute myeloid leukemia (AML) exhibit variable responses to treatment.
  • Investigating factors influencing treatment outcomes in pediatric AML is crucial.

Purpose of the Study:

  • To examine the association between neutrophil recovery time after the first induction course and subsequent infection and relapse rates in pediatric AML patients.
  • To determine if neutrophil recovery kinetics can serve as a predictive marker for treatment outcomes.

Main Methods:

  • Analysis of data from 279 newly diagnosed pediatric AML patients treated under NOPHO-AML 2004 and DB AML-01 protocols.
  • Neutrophil recovery time defined as time to absolute neutrophil count ≥0.5 × 10^9/L.
  • Linear and Cox regression models used to assess associations with infections and relapse.

Main Results:

  • Longer neutrophil recovery time after the first induction course correlated with longer recovery times in subsequent courses.
  • Extended neutrophil recovery time (≥25 days) was associated with an increased risk of grade 3-4 infections (HR 1.4).
  • Prolonged neutrophil recovery (>30 days) after the first induction was linked to a higher risk of relapse in patients not receiving stem cell transplantation (HR 1.7).

Conclusions:

  • Neutrophil recovery time after the initial induction course is a significant predictor of severe infections and relapse in pediatric AML.
  • These findings suggest that neutrophil recovery kinetics could be integrated into risk stratification strategies for pediatric AML.
Abstract

Keywords:
acute myeloid leukemiainfectionneutropeniapediatric cancerrelapse

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