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Intensity-modulated Radiation Therapy for Lymph Node Oligo-recurrence.

Akiko Sato1,2, Motoko Omura3, Yumiko Minagawa3

  • 1Department of Radiation Oncology, Shonan Kamakura General Hospital, Kamakura, Japan akikosato.tk@gmail.com.

In Vivo (Athens, Greece)
|September 3, 2020
PubMed
Summary

Intensity-modulated radiation therapy (IMRT) shows promise for treating lymph node oligo-recurrence. This approach may improve survival rates and reduce progression, with no severe adverse events reported in patients with controlled primary tumors.

Keywords:
Cancerintensity-modulated radiation therapylymph nodesoligo-recurrenceoligometastasesradiation therapy

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Area of Science:

  • Radiation Oncology
  • Medical Physics
  • Clinical Oncology

Background:

  • Lymph node (LN) oligo-recurrence presents a challenge in cancer management.
  • Effective treatment strategies are needed for patients with controlled primary tumors and limited LN recurrence.

Purpose of the Study:

  • To evaluate the clinical outcomes of intensity-modulated radiation therapy (IMRT) in patients with lymph node (LN) oligo-recurrence.
  • To assess the safety and efficacy of IMRT for this specific patient population.

Main Methods:

  • Retrospective review of 21 patients diagnosed with LN oligo-recurrence treated with IMRT.
  • Inclusion of patients with diverse primary tumor sites and histopathological types.
  • Curative intent treatment with IMRT.

Main Results:

  • 3-year overall survival (OS) rate of 75% and in-field progression-free survival (PFS) rate of 52%.
  • Lower dose to gross tumor volume (GTV) and larger GTV were linked to poorer OS.
  • Adenocarcinoma and lower GTV dose were associated with poorer in-field PFS.
  • No severe adverse events were observed.

Conclusions:

  • IMRT is a potentially safe and effective treatment for LN oligo-recurrence.
  • Dose escalation with IMRT, while sparing normal tissues, may enhance OS and in-field PFS.
  • Further research into optimal dose strategies for IMRT in LN oligo-recurrence is warranted.