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- W2590569684 abstract "153 Background: Biochemical recurrence (BCR) after radical prostatectomy (RP) is usually defined at a PSA >0.2 ng/ml. BCR may precede clinical progression by years. Though salvage radiotherapy (SRT) is recommend to be initiated at PSA <0.5 ng/ml, its efficiency at PSA <0.2 ng/ml is not well documented. Methods: We relied on two independent post-RP cohorts. Cohort 1 (n=311, Hamburg) comprised men whose post-RP PSA levels had risen to 0.1-0.2 ng/ml. Further biochemical and clinical progression were recorded during follow-up. Cohort 2 (n=198, Berlin) were patients with BCR who received SRT (66/72 Gy) at a PSA <0.5 ng/ml. The median follow-up was 6.9 years. Post-SRT progression and overall survival were addressed by Kaplan-Meier analysis and Cox regression modelling. Results: In cohort 1, 299 (96%) men experienced further PSA progression (>0.2 ng/ml) within a median time of 7 months. Subsequent PSA rise to >0.3, >0.4, and >0.6 ng/ml was recorded in 174 (58%), 123 (41%), and 24 (8%) men, respectively. Twenty-four (8%) men developed metastases. In cohort 2, 112 men received SRT at PSA between 0.03 and 0.2 ng/ml, and 86 at 0.2-0.499 ng/ml. The latter group, had a poorer 10-years BCR-free Kaplan-Meier rate, 43% vs. 66% (p=0.051). Together with pT<3, Gleason Score <7, and post-RP PSA <0.03 ng/ml, SRT at PSA <0.2 ng/ml was an independent favorable predictor of freedom from BCR (OR=0.60, p<0.05). Ultimately, 14 patients died. However, overall survival did not significantly correlate with the pre-SRT PSA. Conclusions: The vast majority of patients with a PSA >0.1 ng/ml after RP will subsequently progress to PSA >0.2 ng/ml. Improved progression free survival can be achieved, if SRT is administered at a PSA <0.2 ng/ml. Therefore the contemporary PSA threshold for defining BCR after RP needs to be reconsidered and early sRT should be contemplated on a individual basis for optimizing oncological outcomes." @default.
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- W2590569684 date "2015-03-01" @default.
- W2590569684 modified "2023-10-01" @default.
- W2590569684 title "Redefining postprostatectomy biochemical progression: The significance of a PSA cutoff below 0.2 ng/ml—Results from two retrospective series with and without salvage radiotherapy." @default.
- W2590569684 doi "https://doi.org/10.1200/jco.2015.33.7_suppl.153" @default.
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