Radical cystectomy practice patterns in the Nordic countries: results from the prospective NorCys study

BACKGROUND: Muscle invasive bladder cancer (MIBC) is an aggressive disease with a high mortality rate. Radical cystectomy (RC) is the standard treatment for MIBC and selected non-muscle invasive bladder -cancer (NMIBC) cases. The NorCys-study (NCT04523038, NCT04537221 and NCT04523025) aims to validate biomarkers predicting RC outcomes. This report describes RC practice patterns across the Nordic countries. MATERIALS AND METHODS: This prospective, multi-institutional study included bladder cancer patients undergoing RC with or without preoperative chemotherapy in all five Nordic countries from 5/2020 to 1/2025. Clinical and pathological data were collected prospectively into REDCap database and analysed using descriptive statistics, Wilcoxon rank sum and Pearson's Chi-squared tests. RESULTS: A total of 1,642 patients from 15 centres were enrolled. Of these, 35% (531) had clinical NMIBC (T1-Tis-Ta), and 65% (999) had cT2-4 disease. Preoperative chemotherapy was administered to 398/929 (43%) cT2-4 or node-positive patients. The most common neoadjuvant chemotherapy (NAC) regimens were gemcitabine - cisplatin (GC) (275/475 [58%]) and dose-dense methotrexate, vinblastine, doxorubicin and cisplatin (dd-MVAC) (144/475 [30%]). Robot-assisted RC was the most common surgical approach administered in 886 of 1,472 (60%) cases, with variation between centres. Ileal conduit was the predominant diversion method in 1,375 out of 1,465 cases (94%). Median surgical time was 322 min, blood loss was 300 mL and hospital stay was 9 days. Final pathology demonstrated pT0 in 29%, ≥pT2 in 43% and lymph node metastases 203 (17%). CONCLUSION: This study reports current RC practices amongst Nordic countries. Patient cohorts did not differ between countries, and although the practices were generally similar, some differences were noted in chemotherapy regimens, the use of robotic-assisted surgery and rates of early RC.