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Influence of the technique and comorbidities in hypofractionated radiotherapy for prostate cancer

  • R. CorreaEmail author
  • I. Navarro
  • M. Lobato
  • A. Otero
  • I. Jerez
  • J. M. Rico
  • I. Zapata
  • Y. Lupiañez
  • J. A. Medina
  • D. Olmos
  • J. Gómez-Millán
Research Article

Abstract

Purpose

To analyze the differences in toxicity and biochemical relapse-free survival with hypofractionated radiotherapy with three-dimensional radiotherapy (3D-CRT) or volumetric arc therapy (VMAT) for prostate cancer taking into account comorbidity measured using the Charlson Comorbidity Index (CCI).

Methods

From January 2011 to June 2016, 451 patients with prostate cancer were treated with 60 Gy (20 daily fractions). VMAT or 3D-CRT was used. Distribution by stage: 17% low-risk, 27.2% intermediate-risk; 39.2% high-risk, 16.6% very high-risk. Mean CCI was 3.4.

Results

With a median follow up of 51 months, most patients did not experience any degree of acute GI toxicity (80.9%) compared to 19.1%, who experienced some degree, mainly G-I /II. In the multivariate analysis, only technique was associated with acute GI toxicity ≥ G2. Patients treated with VMAT had greater acute GI toxicity compared with those who received 3D-CRT (23.9% vs. 13.5%, p = 0.005). With respect to acute GU toxicity, 72.7% of patients experienced some degree, fundamentally G-I/II. Neither age, CCI, nor androgen deprivation therapy (ADT) were associated with greater toxicity. Overall survival at 2, 5 and 7 years was 97%, 88% and 83% respectively. The only factor with statistical significance was CCI, with a greater number of events in individuals with a CCI ≥ 4 (p < 0.03).

Conclusions

Hypofractionated radiotherapy for prostate cancer is an effective, well-tolerated treatment even for elderly patients with no associated comorbidity. Longer follow up is needed in order to report data on late toxicity.

Keywords

Prostate cancer Hipofractionation Image guided radiotherapy VMAT Charlson index 

Notes

Funding

None declared.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.

Ethics approval and consent to participate

All procedures performed in the study were in accordance with the ethical standards of the Institutional and National Research Committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent for the treatment proposed was obtained from all individual participants included in the study.

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Copyright information

© Federación de Sociedades Españolas de Oncología (FESEO) 2019

Authors and Affiliations

  1. 1.Department of Radiation OncologyHospital Universitario Virgen de la Victoria, Malaga UniversityMalagaSpain
  2. 2.Department of Radiation OncologyJuan Ramón Jimenez HospitalHuelvaSpain
  3. 3.Prostate Cancer Clinical Research UnitSpanish National Cancer Research CenterMadridSpain
  4. 4.CNIO-IBIMA Genitourinary Cancer Research UnitInstitute of Biomedical Research in MalagaMalagaSpain

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