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Permanent prostate brachytherapy using high V150.

Nicholas A Serrano1, Huong T Pham1, Sreeram Narayanan1

  • 1Section of Radiation Oncology, Virginia Mason Medical Center, Seattle, Washington.

Practical Radiation Oncology
|November 22, 2014
PubMed
Summary
This summary is machine-generated.

High V150 in prostate brachytherapy did not significantly increase urinary retention or morbidity. Palladium-103 (103Pd) treatment showed better long-term urinary function recovery than Iodine-125 (125I).

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Area of Science:

  • Oncology
  • Radiation Oncology
  • Urology

Background:

  • Prostate brachytherapy aims for satisfactory tumor coverage, sometimes requiring high V150 (volume receiving >150% of prescribed dose).
  • Concerns exist regarding potential associations between high V150 and increased urinary retention and morbidity.

Purpose of the Study:

  • To evaluate the relationship between high V150 and the risk of urinary retention and morbidity in prostate brachytherapy.
  • To compare outcomes between palladium-103 ((103)Pd) and iodine-125 ((125)I) brachytherapy.

Main Methods:

  • Retrospective review of 207 prostate brachytherapy cases treated with (103)Pd (n=140) or (125)I (n=67).
  • Patients were assessed at baseline and at multiple follow-up intervals.
  • Analysis included V150, urinary retention rates, and American Urologic Association (AUA) scores.

Main Results:

  • High V150 values were observed for both isotopes (72% for (103)Pd, 59% for (125)I).
  • No statistically significant difference in acute urinary retention rates between (103)Pd and (125)I groups.
  • AUA scores returned to baseline by 12 months for (103)Pd patients, but remained elevated for (125)I patients (P=.005).

Conclusions:

  • High V150 in prostate brachytherapy did not correlate with increased risk of urinary retention or morbidity.
  • (103)Pd brachytherapy demonstrated superior long-term urinary symptom recovery compared to (125)I.
  • The risk of urinary retention was low for both isotopes despite high V150.