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Radiation recall myositis in pediatric Ewing sarcoma

Jona Hattangadi1, Brittany Esty, Brian Winey

  • 1Harvard Radiation Oncology Program, Boston, Massachusetts 02215, USA. jhattangadi@partners.org

Pediatric Blood & Cancer
|October 25, 2011
PubMed

Insights

Radiation recall is a rare inflammatory reaction. This study highlights radiation recall myositis in pediatric Ewing sarcoma patients, identified via MRI muscle edema after proton radiotherapy and chemotherapy.

Area of Science:

  • Oncology
  • Radiotherapy
  • Pediatric Cancer

Background:

  • Radiation recall is a rare phenomenon involving inflammation in previously irradiated areas.
  • It is typically triggered by systemic agents and often affects the skin.
  • Radiation recall myositis without skin involvement is exceptionally rare.

Observation:

  • Two pediatric patients with Ewing sarcoma experienced radiation recall.
  • These patients underwent sequential proton radiotherapy and chemotherapy.
  • Magnetic resonance imaging (MRI) revealed muscle edema within prior radiation fields.

Findings:

  • The cases demonstrate radiation recall myositis in pediatric patients.
  • The findings confirm that radiation recall can manifest as muscle inflammation.
  • MRI is a valuable tool for diagnosing radiation recall myositis.

Implications:

  • This study expands the understanding of radiation recall presentations.
  • It highlights the importance of considering radiation recall myositis in pediatric cancer patients.
  • Further research is needed to elucidate the mechanisms and management of radiation recall.

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