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Area of Science:

  • Cardiology
  • Oncology
  • Epidemiology

Background:

  • Childhood cancer survival rates have improved, leading to a greater focus on long-term adverse effects like valvular heart disease (VHD).
  • Identifying specific treatment-related risk factors for VHD is essential for improving the long-term health outcomes of childhood cancer survivors.

Purpose of the Study:

  • To identify treatment-related risk factors for valvular heart disease (VHD) in a large European cohort of long-term childhood cancer survivors.
  • To analyze the association between radiation therapy (RT) and chemotherapy exposure and the development of symptomatic VHD.

Main Methods:

  • A nested case-control study utilizing data from the PanCareSurFup and ProCardio cohorts.
  • Involved detailed radiation dose reconstruction and assessment of cumulative cytotoxic agent exposure in childhood cancer survivors diagnosed between 1940 and 2009.
  • Matched 225 cases of symptomatic VHD with controls 1:2 based on subcohort, sex, age at diagnosis, and diagnosis year.

Main Results:

  • Heart radiation therapy (RT) was strongly associated with VHD risk, showing an exponential dose-response relationship.
  • Cumulative doses of anthracyclines (≥400 mg/m2) and platinum agents were also linked to increased VHD risk.
  • VHD risk associated with RT and anthracyclines increased significantly with longer follow-up periods and patient age.

Conclusions:

  • Heart RT, anthracyclines, and platinum agents are significant risk factors for VHD in childhood cancer survivors.
  • The amplified risks of VHD from RT and anthracyclines over time highlight the critical need for ongoing, long-term cardiac surveillance in this population.