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Impact of reduction of therapy on infectious complications in childhood acute lymphoblastic leukemia

Ulrike B Graubner1, Simone Porzig, Norbert Jorch

  • 1University Children's Hospital, Department of Hematology and Oncology, Munich, Germany.

Pediatric Blood & Cancer
|July 20, 2007
PubMed

Insights

Childhood acute lymphoblastic leukemia (ALL) patients frequently experience serious infections during treatment. Reducing chemotherapy intensity in certain patients significantly lowers infection rates, suggesting a way to improve outcomes.

Area of Science:

  • Pediatric Oncology
  • Infectious Diseases in Immunocompromised Hosts
  • Hematology

Background:

  • Infections are a significant cause of morbidity and mortality in children with acute lymphoblastic leukemia (ALL).
  • Limited data exists on the spectrum and frequency of infectious complications during ALL treatment.

Purpose of the Study:

  • To investigate infectious complications in children undergoing ALL treatment.
  • To evaluate the impact of reduced chemotherapy intensity on infection rates in specific risk groups.

Main Methods:

  • A multicenter study involving 293 children treated with the COALL-06-97 protocol.
  • Analysis of infectious complications across different treatment phases.
  • Comparison of infection rates between standard and reduced reinduction therapy arms for low and high-risk patients.

Main Results:

  • 263 out of 293 patients experienced 682 infectious complications (median 2 per patient), with 5 being lethal.
  • Fever of unknown origin (FUO) was the most common (70.8%), followed by microbiologically documented infections (MDI) and clinically documented infections (CDI).
  • Reduced reinduction therapy led to significantly fewer infections: 26% (low risk) and 38% (high risk) compared to 44% and 57% with standard therapy (P < 0.01).

Conclusions:

  • Intensive chemotherapy for ALL is associated with a high incidence of serious infections.
  • Factors beyond treatment, potentially genetic or environmental, may influence susceptibility to infections.
  • Moderating chemotherapy intensity can substantially decrease the occurrence of infectious episodes in pediatric ALL patients.
Abstract

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