ArticleStrahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al]2018
Pre-radiotherapy PSA progression is a negative prognostic factor in prostate cancer patients using 5‑alpha-reductase inhibitors.
Article in Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al], 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectiveTo investigate the impact of 5‑alpha-reductase inhibitor (5-ARI) use on radiotherapy outcomes for localized prostate cancer. PATIENTS AND
methodsWe included 203 patients on a 5-ARI from our institutional database comprising over 2500 patients who had been treated with either external beam radiotherapy (EBRT) or brachytherapy for localized prostate cancer. Patients received a 5-ARI for urinary symptoms or active surveillance. Cancer progressions at the time of definitive treatment were analyzed according to the following criteria: (a) progression of Gleason score or increase in cancer volume on biopsy, (b) first biopsy positive for cancer after being treated for urinary symptoms with a 5-ARI, and (c) prostate-specific antigen (PSA) progression with or without a previous cancer diagnosis. Biochemical failure (BF) was defined by the Phoenix definition. Log-rank test was used for survival analysis.
resultsAt a median follow-up of 38.2 months (standard deviation 22.2 months), 10 (4.9%) patients experienced BF. Concerning prostate cancer progression criteria, 52% of men demonstrated none, 37% showed only one criterion, and 11% showed two. Using univariate analysis, PSA progression (p = 0.004) and appearance of a positive biopsy (p < 0.001) were significant predictive factors for BF, while Gleason progression (p = 0.3) was not. In multivariate analysis adjusted for cancer aggressiveness, rising PSA (hazard ratio, HR, 5.7; 95% confidence interval, CI, 1.1-28.8; p = 0.04) and the number of cancer progression factors (HR 2.9, 95% CI 1.2-7.0, p = 0.02) remained adverse risk factors.
conclusionPSA progression experienced during 5‑ARI treatment before radiotherapy is predictive of worse biochemical outcome. Such details should be considered when counseling men prior to radiation therapy.
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