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Fetal and neonatal leukemia.

Hart Isaacs1

  • 1Department of Pathology, Children's Hospital San Diego, California 92093-0612, USA. hisaacs@ucsd.edu

Journal of Pediatric Hematology/Oncology
|May 22, 2003
PubMed
Summary

Perinatal leukemia presents unique challenges, with neonates having acute myelocytic leukemia (AML) showing better outcomes than those with acute lymphocytic leukemia (ALL). Prognosis is influenced by age, sex, leukemia type, and genetics.

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Area of Science:

  • Pediatric Oncology
  • Neonatal Hematology
  • Leukemia Pathophysiology

Background:

  • Perinatal leukemia exhibits distinct biological and clinical features compared to leukemia in older children.
  • The prognosis for leukemia in neonates is often unfavorable.
  • Significant differences exist in the clinical presentation and morphology of leukemia between fetuses/neonates and older children.

Purpose of the Study:

  • To delineate the unique clinical and morphological characteristics of fetal and neonatal leukemia.
  • To compare perinatal leukemia with leukemia in older pediatric populations.
  • To identify specific leukemia subtypes with poor prognoses in neonates.

Main Methods:

  • Review of clinical and biological data for perinatal leukemia cases.
  • Comparative analysis of leukemia characteristics in neonates versus older children.
  • Evaluation of prognostic factors including age, sex, leukemia type, and cytogenetics.

Main Results:

  • Neonates with acute myelocytic leukemia (AML) have a better prognosis post-remission than those with acute lymphocytic leukemia (ALL).
  • Age, sex, leukemia type, and cytogenetic findings significantly impact outcomes.
  • Female neonates with pre-B acute lymphocytic leukemia (ALL) face a particularly poor prognosis.
  • Transient leukemia in Down syndrome neonates requires close monitoring for potential progression to acute leukemia, especially acute megakaryoblastic leukemia (AMKL, M7).

Conclusions:

  • Perinatal leukemia requires specialized management due to its unique characteristics and generally poor prognosis.
  • Certain leukemia subtypes, such as pre-B ALL in female neonates, are associated with significantly worse outcomes.
  • Long-term surveillance is crucial for Down syndrome neonates with transient leukemia due to the risk of developing acute leukemia.

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