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Radium and leukemia: is current dogma valid?

J H Stebbings1

  • 1Midwest Epidemiology Associates, Naperville, IL 60540-3737, USA.

Health Physics
|April 3, 1998
PubMed
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Internal radium-226 exposure may pose a leukemia risk, contrary to previous reviews. Radium dial workers, particularly males, showed excess leukemias, suggesting a need for reassessment of radium

Area of Science:

  • Toxicology
  • Radiation Oncology
  • Epidemiology

Background:

  • Previous reviews suggested internal radium-226 (Ra) does not cause leukemia in humans, based on U.S. female radium dial worker data.
  • However, this conclusion may be flawed due to observed early leukemia incidence in female dial workers and excess leukemias in males.
  • Rare erythrocytic leukemias observed in male radium workers mirror findings in Thorotrast case series.

Purpose of the Study:

  • To re-evaluate the leukemogenic risk of internal radium-226 exposure.
  • To challenge the established conclusion that radium does not cause leukemia.
  • To propose alternative data sources for risk projection.

Main Methods:

  • Analysis of leukemia incidence in occupationally exposed populations, including U.S. female radium dial workers and males exposed to radium.

Related Experiment Videos

  • Comparison of leukemia types and timing in radium-exposed individuals with findings from Thorotrast case series.
  • Evaluation of the suitability of Thorotrast data for projecting leukemogenic risk from radium and plutonium.

    • Main Results:

    • Leukemia incidence occurred significantly early in female radium dial workers.
    • Males occupationally exposed to radium exhibited an excess of leukemias.
    • Rare erythrocytic leukemias were observed in male radium workers, consistent with Thorotrast data.

    Conclusions:

    • Current conclusions regarding the lack of leukemia risk from internal radium-226 exposure in humans are questionable.
    • Radium dial worker data, especially for males, indicates a potential leukemogenic risk.
    • Thorotrast data may be more appropriate for projecting leukemogenic risk from radium and plutonium than previously assumed.