Effect of early salvage radiotherapy at PSA？<？0.5？ng/ml and impact of post-SRT PSA nadir in post-prostatectomy recurrent prostate cancer

For patients with recurrent prostate cancer after radical prostatectomy (RP), salvage radiotherapy (SRT) offers a second chance of cure. European guidelines (EAU) recommend SRT at a PSA？<？0.5？ng/ml. We analyze the efficacy of SRT given according to this recommendation and investigate the predictive power of the post-SRT PSA nadir