alexa Adjuvant radiotherapy versus wait-and-see after radical prostatectomy: 10-year follow-up of the ARO 96-02 AUO AP 09 95 trial.
Oncology

Oncology

Journal of Nuclear Medicine & Radiation Therapy

Author(s): Wiegel T, Bartkowiak D, Bottke D, Bronner C, Steiner U,

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Abstract BACKGROUND: Local failure after radical prostatectomy (RP) is common in patients with cancer extending beyond the capsule. Three prospectively randomized trials demonstrated an advantage for adjuvant radiotherapy (ART) compared with a wait-and-see (WS) policy. OBJECTIVE: To determine the efficiency of ART after a 10-yr follow-up in the ARO 96-02 study. DESIGN, SETTING, AND PARTICIPANTS: After RP, 388 patients with pT3 pN0 prostate cancer (PCa) were randomized to WS or three-dimensional conformal ART with 60 Gy. The present analysis focuses on intent-to-treat patients who achieved an undetectable prostate-specific antigen after RP (ITT2 population)--that is, 159 WS plus 148 ART men. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS: The primary end point of the study was progression-free survival (PFS) (events: biochemical recurrence, clinical recurrence, or death). Outcomes were compared by log-rank test. Cox regression analysis served to identify variables influencing the course of disease. RESULTS AND LIMITATIONS: The median follow-up was 111 mo for ART and 113 mo for WS. At 10 yr, PFS was 56\% for ART and 35\% for WS (p<0.0001). In pT3b and R1 patients, the rates for WS even dropped to 28\% and 27\%, respectively. Of all 307 ITT2 patients, 15 died from PCa, and 28 died for other or unknown reasons. Neither metastasis-free survival nor overall survival was significantly improved by ART. However, the study was underpowered for these end points. The worst late sequelae in the ART cohort were one grade 3 and three grade 2 cases of bladder toxicity and two grade 2 cases of rectum toxicity. No grade 4 events occurred. CONCLUSIONS: Compared with WS, ART reduced the risk of (biochemical) progression with a hazard ratio of 0.51 in pT3 PCa. With only one grade 3 case of late toxicity, ART was safe. PATIENT SUMMARY: Precautionary radiotherapy counteracts relapse after surgery for prostate cancer with specific risk factors. Copyright © 2014 European Association of Urology. Published by Elsevier B.V. All rights reserved. This article was published in Eur Urol and referenced in Journal of Nuclear Medicine & Radiation Therapy

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