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  • Title: Hormonal therapy or external-beam radiation with brachytherapy and the risk of death from prostate cancer in men with intermediate risk prostate cancer.
    Author: Rosenberg JE, Chen MH, Nguyen PL, Braccioforte MH, Moran BJ, D'Amico AV.
    Journal: Clin Genitourin Cancer; 2012 Mar; 10(1):21-5. PubMed ID: 22130293.
    Abstract:
    PURPOSE: To determine whether external-beam radiotherapy (EBRT) improves disease control compared with supplemental androgen suppression therapy (AST) in men with intermediate-risk prostate cancer who are being treated with brachytherapy. PATIENTS AND METHODS: A total of 807 men with intermediate-risk prostate cancer (T2bNXM0, Gleason ≤7, prostate-specific antigen [PSA] <20 ng/mL; or cT1c-T2bNXM0, Gleason 7) were consecutively treated with either AST and brachytherapy or EBRT and brachytherapy, between 1997 and 2007, and were followed up until September 21, 2007. A Fine and Gray competing risks multivariable regression model was used to assess whether AST or radiotherapy dose escalation reduced the risk of prostate-cancer-specific mortality (PCSM) when adjusting for age, PSA, Gleason score, and tumor category. RESULTS: Treatment with brachytherapy and with EBRT was associated with a significant increase in the risk of PCSM compared with brachytherapy and AST (adjusted hazard ratio [HR] 4.027 [95% CI, 1.168-13.89]; P = .027) after adjusting for age and prostate cancer prognostic factors. A Gleason score of 4+3 and increasing PSA were associated with worse PCSM (adjusted HR 8.882 [95% CI, 1.095-72.04]; P = .041; and adjusted HR 8.029 [95% CI, 2.38-28.8]; P = .0014, respectively). CONCLUSION: Supplemental AST use compared with EBRT is associated with a lower risk of PCSM in men with intermediate-risk PC undergoing brachytherapy. Prospective validation in a randomized controlled trial is needed.
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