Objective: To assess the influence of biochemical recurrence (BCR) risk groups and PSA kinetics on the outcomes of radioguided surgery against prostate-specific membrane antigen (PSMA-RGS). Currently, neither BCR risk group nor PSA doubling time (PSA-DT), or PSA velocity (PSA-V) are actively assigned or relevant for counseling prior to PSMA-RGS. Methods: We retrospectively analyzed PSMA-RGS cases for oligorecurrent prostate cancer between 2014 and 2023. BCR risk groups, PSA-DT, and PSA-V were analyzed as predictors for complete biochemical response (cBR, PSA < 0.2 ng/mL), BCR-free, and therapy-free survival (BCRFS, TFS). Results: Of 374 included patients, only 21/374 (6%) and 201/374 (54%) were classified as low- and high-risk BCR (no group assignment possible in 152/374, 41%). A total of 13/21 (62%) patients with low- and 120/201 (60%) with high-risk BCR achieved cBR (p= 1.0). BCR classification was no predictor for BCRFS (HR:1.61, CI: 0.70–3.71,p= 0.3) or subsequent TFS (HR:1.07, CI: 0.46–2.47,p= 0.9). A total of 47/76 (62%) patients with PSA-DT ≤ 6 mo and 50/84 (60%) with PSA-DT > 6 mo achieved cBR (p= 0.4). PSA-DT was not associated with cBR (OR: 0.99, CI: 0.95–1.03,p= 0.5), BCRFS (HR: 1.00, CI: 0.97–1.03,p= 0.9), or TFS (HR: 1.02, CI: 0.99–1.04,p= 0.2). Consistent negative findings were recorded for PSA-V. Conclusions: The BCR risk groups and PSA kinetics do not predict the oncological success of PSMA-RGS performed at low absolute PSA values. Indolent low-risk BCR is rarely treated by PSMA-RGS.
目的:评估生化复发(BCR)风险分组及前列腺特异性抗原(PSA)动力学对前列腺特异性膜抗原放射引导手术(PSMA-RGS)疗效的影响。目前,在PSMA-RGS术前咨询中,BCR风险分组、PSA倍增时间(PSA-DT)及PSA速率(PSA-V)均未被常规纳入评估体系。方法:回顾性分析2014年至2023年间接受PSMA-RGS治疗的寡复发前列腺癌病例。以BCR风险分组、PSA-DT及PSA-V作为预测指标,分析其与完全生化缓解(cBR,PSA < 0.2 ng/mL)、无生化复发生存期(BCRFS)及无治疗生存期(TFS)的关联性。结果:在纳入的374例患者中,仅21例(6%)被划分为低危BCR组,201例(54%)为高危BCR组(152例患者无法进行风险分组,占41%)。低危组中13例(62%)与高危组中120例(60%)患者达到cBR(p=1.0)。BCR风险分组对BCRFS(HR:1.61,CI:0.70–3.71,p=0.3)及后续TFS(HR:1.07,CI:0.46–2.47,p=0.9)均无预测价值。PSA-DT ≤ 6个月组中47/76例(62%)与PSA-DT > 6个月组中50/84例(60%)患者达到cBR(p=0.4)。PSA-DT与cBR(OR:0.99,CI:0.95–1.03,p=0.5)、BCRFS(HR:1.00,CI:0.97–1.03,p=0.9)及TFS(HR:1.02,CI:0.99–1.04,p=0.2)均无显著关联。PSA-V的分析结果与此一致。结论:在PSA绝对值较低时实施的PSMA-RGS,其肿瘤学疗效不受BCR风险分组及PSA动力学参数影响。惰性低危BCR患者极少接受PSMA-RGS治疗。