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External Beam Re-irradiation in Rectal Cancer.

R Owens1, R Muirhead1

  • 1Oxford Cancer Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, UK.

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|December 12, 2017
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Summary

Re-irradiation offers significant symptomatic relief for palliative patients with locally recurrent rectal cancer. For potentially operable cases, evidence supports re-irradiation for downstaging and improved outcomes.

Keywords:
Radiotherapyre-irradiationrectumresection statusretreatsymptoms

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Area of Science:

  • Oncology
  • Radiation Oncology
  • Surgical Oncology

Background:

  • Locally recurrent rectal cancer presents significant symptoms and poor prognosis.
  • Radical resection rates are low, necessitating alternative management strategies.
  • Previous irradiation is common in patients with recurrent rectal cancer, making re-irradiation a potential option.

Purpose of the Study:

  • To review the current literature on re-irradiation for locally recurrent rectal cancer.
  • To evaluate the benefits of re-irradiation in both palliative and potentially operable patient groups.
  • To identify key considerations and future research directions for re-irradiation strategies.

Main Methods:

  • Literature review of studies on re-irradiation for locally recurrent rectal cancer.
  • Analysis of evidence for palliative symptom relief.
  • Discussion of evidence for potentially operable patients, including treatment indications, dose, fractionation, technique, margins, and constraints.

Main Results:

  • Palliative patients experience significant symptomatic relief with standard re-irradiation doses up to 30 Gy.
  • Evidence for re-irradiation in potentially operable patients is discussed concerning critical treatment parameters.
  • The review highlights areas for future research and development in re-irradiation techniques and applications.

Conclusions:

  • Re-irradiation is a viable strategy for managing locally recurrent rectal cancer, offering palliation and potential for downstaging.
  • Careful consideration of treatment parameters is crucial for optimizing outcomes in potentially operable patients.
  • Further research is needed to refine re-irradiation protocols and expand its application in rectal cancer management.