KLK3 and neoplasm: Subsequently, not 68Ga-PSMA PET/CT but pre-sRT PSA (<0.5 vs. ≥0.5 ng/ml), tumor stage (pT2 vs. pT3-4), Gleason score (GS ≤ 7 vs. GS8-10), and radiation dose (<70 vs. ≥70 Gy) were the only factors significantly associated with BRFS.