• Int. J. Radiat. Oncol. Biol. Phys. · Apr 2012

    Outcome after conformal salvage radiotherapy in patients with rising prostate-specific antigen levels after radical prostatectomy.

    • Hans Geinitz, Martina G Riegel, Reinhard Thamm, Sabrina T Astner, Carolin Lewerenz, Frank Zimmermann, Michael Molls, and Carsten Nieder.
    • Department of Radiation Oncology, Klinikum rechts der Isar der Technischen Universität München, Munich, Germany. hans.geinitz@lrz.tumuenchen.de
    • Int. J. Radiat. Oncol. Biol. Phys. 2012 Apr 1; 82 (5): 1930-7.

    PurposeThis study attempts to improve our understanding of the role of salvage radiotherapy (SRT) in patients with prostate-specific antigen (PSA) relapse after radical prostatectomy with regard to biochemical control, rate of distant metastasis, and survival.Methods And MaterialsWe performed a retrospective analysis of 96 men treated with conformal prostate bed SRT (median, 64.8 Gy) at a single institution (median follow-up, 70 months). The majority had intermediate- or high-risk prostate cancer. Fifty-four percent underwent a resection with positive margins (R1 resection). The median time interval between surgery and SRT was 22 months.ResultsAfter SRT, 66% of patients reached a PSA nadir of less than 0.2 ng/mL. However, the 5-year biochemical no evidence of disease rate was 35%. Seminal vesicle involvement was predictive for a significantly lower biochemical no evidence of disease rate. All patients with a preoperative PSA level greater than 50 ng/mL relapsed biochemically within 2 years. The 5-year distant metastasis rate was 18%, the 5-year prostate cancer-specific survival rate was 90%, and the 5-year overall survival rate was 88%. Significantly more distant metastases developed in patients with a PSA nadir greater than 0.05 ng/mL after SRT, and they had significantly inferior prostate cancer-specific and overall survival rates. Resection status (R1 vs. R0) was not predictive for any of the endpoints.ConclusionsMen with postoperative PSA relapse can undergo salvage treatment by prostate bed radiotherapy, but durable PSA control is maintained only in about one-third of the patients. Despite a high biochemical failure rate after SRT, prostate cancer-specific survival does not decrease rapidly.Copyright © 2012 Elsevier Inc. All rights reserved.

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