The Prognostic Role of Preoperative PSMA PET/CT in cN0M0 pN+ Prostate Cancer: A Multicenter Study.

CONTEXT: Despite negative preoperative conventional imaging, up to 10% of patients with prostate cancer (PCa) harbor lymph-node involvement (LNI) at radical prostatectomy (RP). The advent of more accurate imaging modalities such as PET/CT improved the detection of LNI. However, their clinical impact and prognostic value are still unclear. We aimed to investigate the prognostic value of preoperative PET/CT in patients node positive (pN+) at RP. EVIDENCE SYNTHESIS: We retrospectively identified cN0M0 patients at conventional imaging (CT and/or MRI, and bone scan) who had pN+ PCa at RP at 17 referral centers. Patients with cN+ at PSMA/Choline PET/CT but cN0M0 at conventional imaging were also included. Systemic progression/recurrence was the primary outcome; Cox proportional hazards models were used for multivariate analysis. EVIDENCE ACQUISITION: We included 1163 pN+ men out of whom 95 and 100 had preoperative PSMA and/or Choline PET/CT, respectively. ISUP grade ≥4 was detected in 66.6%. Overall, 42% of patients had postoperative PSA persistence (≥0.1 ng/mL). Postoperative management included initial observation (34%), ADT (22.7%) and adjuvant RT+/-ADT (42.8%). Median follow-up was 42 months. Patients with cN+ on PSMA PET/CT had an increased risk of systemic progression (52.9% vs. 13.6% cN0 PSMA PET/CT vs. 21.5% cN0 at conventional imaging; P < .01). This held true at multivariable analysis: (HR 6.184, 95% CI: 3.386-11-295; P < .001) whilst no significant results were highlighted for Choline PET/CT. No significant associations for both PET types were found for local progression, BCR, and overall mortality (all P > .05). Observation as an initial management strategy instead of adjuvant treatments was related with an increased risk of metastases (HR 1.808; 95% CI: 1.069-3.058; P < .05). CONCLUSIONS: PSMA PET/CT cN+ patients with negative conventional imaging have an increased risk of systemic progression after RP compared to their counterparts with cN0M0 disease both at conventional and/or molecular imaging.

Are clinical guidelines designed according to guidelines? Cross-sectional assessment of quality and transparency of clinical guidelines in urology.

PURPOSE: Guidelines and recommendations become increasingly important in clinical urologic practice. This study aims to inform clinicians using guidelines on how to evaluate the quality of the methodology and transparency of these documents. METHODS: The guidelines on management of castration-resistant prostate cancer of the American Urology Association, European Association of Urology, National Comprehensive Cancer Network, National Institute for Health and Care Excellence, European Society of Medical Oncology were reviewed using the AGREE-II tool (Appraisal of Guidelines for Research and Evaluation). We reported and compared the domain scores for the domains 1 scope and purpose, 2 stakeholder involvement, 3 rigor of development, 4 clarity of presentation, 5 applicability, and 6 editorial independence (100% indicates highest-best quality score). RESULTS: The domains evaluated highest and with lowest variability were 'editorial independence' (92% {88-95%}) and 'clarity of presentation' (83% {72-90%}), while the domains with the lowest scores and most variability were 'stakeholder involvement' (56% {36-79%}) and 'applicability' (40% {30-63%}). Length and extent of detail of guidelines vary considerably, each with its own strengths and limitations and adapted to target users. Standard external review using AGREE criteria may be preferable. A formal search strategy was not performed. Findings may be outdated by guidelines' updates. CONCLUSIONS: Clinicians using practice guidelines need to be aware of the different domains of methodology and transparency used to assess the quality of guidelines contents and recommendations. Urologists increasingly use guidelines for support in evidence-based recommendations in clinical practice. It is very important to know how to assess these documents. This study applies standard criteria to compare the design and background of different available guidelines on prostate cancer no longer responding to hormonal treatment.