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Related Experiment Videos

Ewing sarcoma: radiation dose and target volume.

Sarah S Donaldson1

  • 1Department of Radiation Oncology, Stanford University Medical Center, Stanford, California 94305-5847, USA. sarah@reyes.stanford.edu

Pediatric Blood & Cancer
|March 30, 2004
PubMed
Summary

Optimizing radiation therapy for localized bone Ewing sarcoma improves local control rates, ranging from 58-93% with multidisciplinary care. Recommended doses are 55.8-60.0 Gy for improved outcomes in pediatric patients.

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Area of Science:

  • Pediatric Oncology
  • Radiation Oncology
  • Sarcoma Research

Background:

  • Ewing sarcoma outcomes in children and adolescents are influenced by prognostic factors, with local control being the preferred assessment post-radiation therapy.
  • Traditional survival metrics like event-free and overall survival are common, but local tumor control is critical after radiation treatment.

Purpose of the Study:

  • To assess optimal radiation dose and volume for localized, osseous Ewing sarcoma in children and adolescents.
  • To investigate novel approaches and techniques for enhancing local control in Ewing sarcoma patients.

Main Methods:

  • A comprehensive review of historical large-group experiences spanning several decades.
  • Analysis of radiation therapy parameters including dose, volume, and fractionation for localized bone Ewing sarcoma.

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Main Results:

  • Multidisciplinary therapy achieves 5-year local control rates of 58-93%; definitive irradiation yields 53-86% local control.
  • Recommended radiation doses are 55.8-60.0 Gy, with specific doses for gross (55.8 Gy) and microscopic (45 Gy) disease post-surgery.
  • Optimal irradiated volume involves a margin around the pretreatment tumor and a boost to the post-chemotherapy tumor volume; quality control and accurate volume definition are crucial.

Conclusions:

  • Innovative radiation strategies within multidisciplinary care enhance local control for localized bone Ewing sarcoma.
  • Improved local control contributes to better function and quality of life for young patients.
  • Continued advancements in radiation techniques are vital for optimizing outcomes in pediatric sarcoma patients.