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Biochemical Control and Toxicity Outcomes of Stereotactic Body Radiation Therapy Versus Low-Dose-Rate Brachytherapy in the Treatment of Low- and Intermediate-Risk Prostate Cancer.
- Source :
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International journal of radiation oncology, biology, physics [Int J Radiat Oncol Biol Phys] 2021 Apr 01; Vol. 109 (5), pp. 1232-1242. Date of Electronic Publication: 2020 Nov 07. - Publication Year :
- 2021
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Abstract
- Purpose: Low-dose-rate (LDR) brachytherapy and stereotactic body radiation therapy (SBRT) have both shown acceptable outcomes in the treatment of low- and intermediate-risk prostate cancer. Minimal data have been published directly comparing rates of biochemical control and toxicity with these 2 modalities. We hypothesize that LDR and SBRT will provide similar rates of biochemical control.<br />Methods and Materials: All low- and intermediate-risk patients with prostate cancer treated definitively with SBRT or LDR between 2010 and 2018 were captured. Phoenix definition was used for biochemical failure. Independent t tests were used to compare baseline characteristics, and repeated measure analysis of variance test was used to compare American Urologic Association (AUA) and the Expanded Prostate Cancer Index Composite (EPIC) scores between treatment arms over time. Biochemical control was estimated using the Kaplan-Meier method. Differences in acute and late toxicity were assessed via Pearson χ <superscript>2</superscript> .<br />Results: In the study, 219 and 118 patients were treated with LDR and SBRT. Median follow-up was 4.3 years (interquartile range, 3.1-6.1). All patients treated with LDR received 125.0 Gy in a single fraction. SBRT consisted of 42.5 Gy in 5 fractions. Five-year biochemical control for LDR versus SBRT was 91.6% versus 97.6% (P = .108). LDR patients had a larger increase in mean AUA scores at 1 month (17.2 vs 10.3, P < .001) and 3 months posttreatment (14.0 vs 9.7, P < .001), and in mean EPIC scores at 1 month (15.7 vs 13.8, P < .001). There was no significant difference between LDR and SBRT in late grade 3 genitourinary toxicity (0.9% vs 2.5%, P = .238); however, LDR had lower rates of late grade 3 gastrointestinal toxicity (0.0% vs 2.5%, P = .018).<br />Conclusions: Our data show similar biochemical control and genitourinary toxicity rates at 5 years for both SBRT and LDR, with slightly higher gastrointestinal toxicity with SBRT and higher AUA and EPIC scores with LDR.<br /> (Copyright © 2020 Elsevier Inc. All rights reserved.)
- Subjects :
- Aged
Analysis of Variance
Brachytherapy adverse effects
Gastrointestinal Tract radiation effects
Humans
Kaplan-Meier Estimate
Male
Middle Aged
Neoplasm Grading
Organs at Risk radiation effects
Prostate-Specific Antigen blood
Prostatic Neoplasms blood
Prostatic Neoplasms pathology
Quality of Life
Radiosurgery adverse effects
Radiotherapy Dosage
Risk
Time Factors
Urogenital System radiation effects
Brachytherapy methods
Prostatic Neoplasms radiotherapy
Radiosurgery methods
Subjects
Details
- Language :
- English
- ISSN :
- 1879-355X
- Volume :
- 109
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- International journal of radiation oncology, biology, physics
- Publication Type :
- Academic Journal
- Accession number :
- 33171199
- Full Text :
- https://doi.org/10.1016/j.ijrobp.2020.11.003