Comparative real-world survival outcomes of muscle-invasive bladder cancer treated with bladder-only vs. whole-pelvis concurrent chemoradiation

Auteurs-es

  • Carlos Riveros Department of Urology, Houston Methodist Hospital, Houston, TX
  • Sanjana Ranganathan Department of Urology, Houston Methodist Hospital, Houston, TX
  • Waqar Haque Department of Radiation Oncology, Houston Methodist Hospital, Houston, TX
  • Emily Huang Department of Urology, Houston Methodist Hospital, Houston, TX
  • Jiaqiong Xu Center for Health Data Science and Analytics, Houston Methodist Hospital, Houston, TX
  • Girish S. Kulkarni Division of Urology and Surgical Oncology, Department of Surgery, Princess Margaret Cancer Centre, University Health Network, University of Toronto, Toronto, ON; Division of Urology, University of Toronto, Toronto, ON
  • Michael Geng School of Engineering Medicine, Texas A&M University, Houston, TX
  • Maryam Anis Department of Urology, Houston Methodist Hospital, Houston, TX
  • Taliah Muhammad Department of Urology, Houston Methodist Hospital, Houston, TX
  • Keith Chan Department of Urology, Houston Methodist Hospital, Houston, TX; Center for TME Spatial Profiling in GU Oncology, Houston Methodist Research Institute, Houston, TX
  • Andrew Farach Department of Radiation Oncology, Houston Methodist Hospital, Houston, TX
  • Bin S. Teh Department of Radiation Oncology, Houston Methodist Hospital, Houston, TX
  • Brian J. Miles Department of Urology, Houston Methodist Hospital, Houston, TX
  • Zachary Klaassen Division of Urology, Medical College of Georgia, Augusta University, Augusta, GA
  • Guru P. Sonpavde Genitourinary Oncology Program, AdventHealth Cancer Institute, Orlando, FL
  • Christopher Wallis Division of Urology and Surgical Oncology, Department of Surgery, Princess Margaret Cancer Centre, University Health Network, University of Toronto, Toronto, ON; Division of Urology, University of Toronto, Toronto, ON; Division of Urology, Mount Sinai Hospital, Toronto, ON
  • Raj Satkunasivam Department of Urology, Houston Methodist Hospital, Houston, TX

DOI :

https://doi.org/10.5489/cuaj.8386

Mots-clés :

bladder cancer, chemotherapy, radiotherapy, lymph nodes, survival

Résumé

INTRODUCTION: Elective pelvic nodal irradiation for patients with muscle-invasive bladder cancer (MIBC) undergoing trimodal therapy (TMT) is controversial. In patients with node-negative (N0) MIBC, the benefit of elective whole-pelvis concurrent chemoradiation (WP-CCR) compared to bladder-only (BO)-CCR has not been demonstrated. Using real-world data from the National Cancer Database (NCDB), we sought to compare the overall survival (OS) between BO-CCR and WP-CCR for MIBC.

METHODS: Using the 2020 NCDB Participant User File, we identified cases of MIBC diagnosed between 2017 and 2019. We selected patients with clinical T2–T4aN0M0 disease receiving CCR as first-line treatment. CCR was defined as transurethral resection of bladder tumor followed by ≥40 Gy radiation to the bladder with concurrent single- or multiple-agent chemotherapy. Based on elective nodal irradiation status, patients were stratified as having received BO-CCR vs. WP-CCR. OS analysis was performed using summary three-month conditional landmark, inverse probability treatment weighting (IPTW)-adjusted Kaplan-Meier estimates, and Cox regression.

RESULTS: A total of 604 patients receiving CCR for MIBC were identified: 367 (60.8%) BO-CCR and 237 (39.2%) WP-CCR. Before IPTW, the groups were imbalanced in terms of baseline characteristics. The median followup of the weighted population was 42.3 months (interquartile range 18.1–49.1 months). In IPTW-adjusted Cox proportional hazards regression analysis, WP-CCR was associated with a significant OS benefit compared to BO-CCR (adjusted hazard ratio 0.72, 95% confidence interval 0.54–0.96, p=0.026).

CONCLUSIONS: In the setting of CCR for N0 MIBC, this retrospective NCDB analysis revealed that WP-CCR was associated with a benefit in OS compared to BO-CCR.

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Publié-e

2023-10-23

Comment citer

Riveros, C., Ranganathan, S., Haque, W., Huang, E., Xu, J., Kulkarni, G. S., … Satkunasivam, R. (2023). Comparative real-world survival outcomes of muscle-invasive bladder cancer treated with bladder-only vs. whole-pelvis concurrent chemoradiation. Canadian Urological Association Journal, 18(2), 17–24. https://doi.org/10.5489/cuaj.8386

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Rubrique

Original Research