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Adoption of Radiation Therapy Oncology Group consensus guidelines for post-prostatectomy radiation therapy in an academic tertiary care center

  • Original Research
  • Published:
Journal of Radiation Oncology

Abstract

Objective

This study aimed to define the impact of Radiation Therapy Oncology Group (RTOG) guidelines for clinical target volume (CTV) delineation for post-prostatectomy external beam radiation therapy (EBRT) on radiation dosimetry and toxicity.

Methods

We reviewed the records of 125 patients treated with post-prostatectomy EBRT at our institution. We recorded CTV size, dosimetric parameters for the rectum and bladder, and acute and late gastrointestinal (GI) and genitourinary (GU) toxicity. To estimate the impact of the RTOG guidelines, patients treated prior to 2010 were compared to patients treated from 2010 to 2013 for each of these endpoints.

Results

CTVs were larger and less variable for patients treated from 2010 to 2013 (mean 143.6 cm3, standard deviation (SD) 43.9) compared to patients treated prior to 2010 (mean 88.9 cm3, SD 65.6) (p < 0.001). Although patients treated from 2010 to 2013 had higher bladder volume receiving 65 Gy (V65) (47.7 vs. 32.9 %, p = 0.03), V50 (58.3 vs. 45.4 %, p = 0.04), V30 (81.9 vs. 61.9 %, p = 0.03), V20 (94.3 vs. 80.8 %, p = 0.01), and V10 (97.9 vs. 90.0 %, p = 0.05), there were no differences in acute (p = 0.17) or late (p = 0.59) GU toxicity between groups. There were no differences in acute (p = 0.22) or late (p = 0.40) GI toxicity between groups.

Conclusion

Adoption of RTOG guidelines for post-prostatectomy EBRT was associated with larger and less variable CTVs at our institution. There have been no changes in treatment-related toxicity compared to patients treated prior to publication of the guidelines.

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Conflict of interest

David Marcus, Peter Rossi, Sherrie Cooper, and Ashesh Jani declare that they have no conflict of interest. There are no financial disclosures for any of the authors in this study.

Compliance with ethics guidelines

This article does not contain any studies with human or animal subjects performed by any of the authors.

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Authors and Affiliations

  1. Department of Radiation Oncology, Winship Cancer Institute, Emory University, Atlanta, GA, USA

    David M. Marcus, Peter J. Rossi, Sherrie Cooper & Ashesh B. Jani

  2. Valley View Hospital, 1906 Blake Avenue, Glenwood Springs, CO, 81601, USA

    David M. Marcus

Authors
  1. David M. Marcus
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  2. Peter J. Rossi
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  3. Sherrie Cooper
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  4. Ashesh B. Jani
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Correspondence to David M. Marcus.

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Marcus, D.M., Rossi, P.J., Cooper, S. et al. Adoption of Radiation Therapy Oncology Group consensus guidelines for post-prostatectomy radiation therapy in an academic tertiary care center. J Radiat Oncol 3, 395–400 (2014). https://doi.org/10.1007/s13566-014-0172-5

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  • DOI: https://doi.org/10.1007/s13566-014-0172-5

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