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Related Experiment Videos

Pediatric bone marrow cellularity: are we expecting too much?

S E Friebert1, L B Shepardson, S B Shurin

  • 1Department of Pediatric Hematology/Oncology, Rainbow Babies and Children's Hospital, Cleveland, OH 44106, USA.

Journal of Pediatric Hematology/Oncology
|October 27, 1998
PubMed
Summary
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Pediatric bone marrow cellularity is lower than previously thought and declines with age until five years old. These findings help establish normal values for pediatric patients undergoing diagnosis or treatment.

Area of Science:

  • Hematology
  • Pediatric Oncology
  • Biostatistics

Background:

  • Accurate bone marrow cellularity assessment is crucial for diagnosing and monitoring pediatric illnesses.
  • Established normal values for pediatric bone marrow cellularity are lacking.
  • This data is vital for evaluating pediatric patients and potential sibling donors for transplantation.

Purpose of the Study:

  • To establish well-defined, age-related normal values for bone marrow cellularity in pediatric patients.
  • To provide a reference for accurate diagnosis and treatment monitoring in pediatric hematologic and oncologic conditions.

Main Methods:

  • Retrospective review of 448 bone marrow core biopsy or clot specimens from patients aged 1 to 18 years.
  • Exclusion of patients with hematopoietic malignancies or conditions affecting marrow cellularity.

Related Experiment Videos

  • Standardized collection and fixation of all samples from the posterior iliac crest.

    • Main Results:

    • Mean bone marrow cellularity across all pediatric samples was 65.4%.
    • Cellularity significantly declined with age, highest in those younger than 2 years (79.8%) and decreasing until age 5.
    • Cellularity stabilized in older pediatric age groups (10-18 years).

    Conclusions:

    • Current pediatric bone marrow cellularity values are lower than previously estimated.
    • Age is a significant factor, with cellularity declining until age 5 and stabilizing thereafter.
    • Diagnostic differences in cellularity were minimal after adjusting for age.