How Will Data From ASCO GU 2026 Impact the Treatment Paradigm?

Following the 2026 American Society of Clinical Oncology (ASCO) Genitourinary Cancers Symposium, Oncology Decoded hosts Manojkumar Bupathi, MD, MS; and Benjamin Garmezy, MD, met to break down the key trials and presentations that may help move the needle in genitourinary oncology. Together, they reviewed findings and clinical implications across various bladder cancer, kidney cancer, and prostate cancer populations.

Among several sessions highlighted during their discussion, the experts covered the following presentations:

1. Phase 3 KEYNOTE-B15 Trial (NCT04700124)¹
   1. Enfortumab vedotin-ejfv (Padcev) plus pembrolizumab (Keytruda) significantly prolonged event-free survival (EFS) outcomes vs gemcitabine plus cisplatin among patients with muscle-invasive bladder cancer (MIBC; HR, 0.53; 95% CI, 0.41-0.70; P <.001).
   2. The rate of pathological complete response also improved by an estimated difference of 23.4% (95% CI, 16.7%-29.8%; P <.001) with the enfortumab vedotin combination.
   3. Data from this trial point towards the potential removal of chemotherapy in the perioperative therapy landscape.
2. Phase 3 LITESPARK-011 Trial (NCT04586231)²
   1. Belzutifan (Welireg) plus lenvatinib (Lenvima) improved progression-free survival (PFS; HR, 0.70; 95% CI, 0.59-0.84; P = .00007) and responses vs cabozantinib (Cabometyx) monotherapy among those with advanced clear cell renal cell carcinoma.
   2. Data showed a median duration of response (DOR) of 23.0 months with the belzutifan combination vs 12.3 months with cabozantinib.
   3. Findings may support an eventual FDA approval of belzutifan/lenvatinib in this patient population.
3. Phase 3 PEACE-3 Trial (NCT02194842)³
   1. Combining enzalutamide (Xtandi) with radium-223 (Xofigo) boosted overall survival (OS) compared with enzalutamide alone among patients with metastatic castration-resistant prostate cancer (HR, 0.75; 95% CI, 0.60-0.95; P = .0078).
   2. Previously reported rPFS improvements with the combination were sustained with longer follow-up, as data showed a median rPFS of 19.2 months vs 16.4 months in the experimental and comparator arms, respectively.

Drs. Bupathi and Garmezy are executive cochairs of the Genitourinary Cancer Research Executive Committee at Sarah Cannon Research Institute (SCRI). Additionally, Dr. Bupathi is president and a medical oncologist with Rocky Mountain Cancer Centers, specializing in solid tumors and genitourinary cancers. Dr. Garmezy is the associate director of genitourinary research for SCRI and a medical oncologist at SCRI Oncology Partners, specializing in genitourinary cancers.

References

1. Galsky MD, Valderrama BP, Maruzzo M, et al. Neoadjuvant and adjuvant enfortumab vedotin (EV) plus pembrolizumab (pembro) for participants with muscle-invasive bladder cancer (MIBC) who are eligible for cisplatin: randomized, open-label, phase 3 KEYNOTE-B15 study. J Clin Oncol. 2026;44(suppl 7):LBA630. doi:10.1200/JCO.2026.44.7_suppl.LBA630
2. Motzer RJ, Park SH, McDermott RS, et al. Belzutifan (bel) plus lenvatinib (lenva) versus cabozantinib (cabo) for advanced renal cell carcinoma (RCC) after anti-PD-(L)1 therapy: open-label phase 3 LITESPARK-011 study. J Clin Oncol. 2026;44(suppl 7):417. doi:10.1200/JCO.2026.44.7_suppl417
3. Gallardo E, Tombal BF, Saad F, et al. Final overall survival results from the EORTC 1333/PEACE-3 trial: enzalutamide with or without radium-223 in metastatic castration-resistant prostate cancer. J Clin Oncol. 2026;44(suppl 7):15. doi:10.1200/JCO.2026.44.7_suppl.15