Despite immune checkpoint inhibitor (ICI) approval for metastatic renal cell carcinoma (mRCC) in 2015, cytoreductive nephrectomy (CN) is guided by extrapolation from earlier classes of therapy. We evaluated survival outcomes, timing, and safety of combining CN with modern immunotherapy (IO) for mRCC.
From 96,329 renal cancer cases reported to the NCDB between 2015 and 2016, we analyzed 391 surgical candidates diagnosed with clear cell mRCC treated with IO ± CN and no other systemic therapies. Primary outcome was overall survival (OS) stratified by the performance of CN (CN + IO vs. IO alone). Secondary outcomes included OS stratified by the timing of CN, pathologic findings, and perioperative outcomes.
Of 391 patients, 221 (56.5%) received CN + IO and 170 (43.5%) received IO only. Across a median follow-up of 14.7 months, patients who underwent CN + IO had superior OS (median NR vs. 11.6 months; hazard ratio 0.23, P < 0.001), which was upheld on multivariable analyses. IO before CN resulted in lower pT stage, grade, tumor size, and lymphovascular invasion rates compared to upfront CN. Two of 20 patients (10%) undergoing CN post-IO achieved complete pathologic response in the primary tumor (pT0). There were no positive surgical margins, 30-day readmissions, or prolonged length of stay in patients undergoing delayed CN.
Using a large, national, registry-based cohort, we provide the first report of survival outcomes in mRCC patients treated with CN combined with modern IO. Our findings support an oncologic role for CN in the ICI era and provide preliminary evidence regarding the timing and safety of CN relative to IO administration.
Urologic oncology. 2020 Apr 03 [Epub ahead of print]
Nirmish Singla, Ryan C Hutchinson, Rashed A Ghandour, Yuval Freifeld, Dong Fang, Arthur I Sagalowsky, Yair Lotan, Aditya Bagrodia, Vitaly Margulis, Hans J Hammers, Solomon L Woldu
Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX; Urology Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY., Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX., Department of Urology, Peking University First Hospital, Institute of Urology, Peking University, National Urological Cancer Center, Beijing, China., Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX; Department of Urology, I.M. Sechenov First Moscow State University, Moscow, Russia., Division of Hematology and Oncology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX., Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX. Electronic address: .