Level 1 evidence
“We now know that enfortumab vedotin is here to stay in the armamentarium for the treatment of urothelial cancer, adding its name to the ranks of others which have shown level 1 evidence, proof of a survival benefit in metastatic urothelial carcinoma,” commented invited discussant Arlene O. Siefker-Radtke, MD, a professor in the department of genitourinary medical oncology, University of Texas MD Anderson Cancer Center, Houston.
Dr. Arlene O. Siefker-Radtke
“I’ve been impressed not only by the activity of enfortumab vedotin in visceral and liver metastases, but also by the impact in patients with bone metastases as this appears very helpful in controlling bone pain in many patients,” she noted.
Preventing and managing toxicity requires appropriate patient selection, careful monitoring, and dose modifications, with knowledge of the agent’s adverse event profile and of factors conferring elevated risk for events, Dr. Siefker-Radtke said.
“The early evidence for enfortumab vedotin in the postimmunotherapy, platinum-ineligible group suggests that this can help treat patients with an unmet need due to their inability to receive platinum-based therapy,” she concluded. “And while it’s currently approved in the third-line setting, we are all eagerly awaiting the outcomes of the frontline studies of enfortumab vedotin combined with pembrolizumab, which showed such a promising objective response rate, as has been presented at earlier meetings.”
The trial was sponsored by Astellas Pharma and Seagen. Dr. Powles disclosed relationships with Astellas Pharma, AstraZeneca, Bristol-Myers Squibb, and numerous other pharmaceutical and biotechnology companies. Dr. Siefker-Radtke disclosed relationships with AstraZeneca, Bavarian Nordic, Bristol-Myers Squibb, and a variety of other pharmaceutical and biotechnology companies, as well as patents, royalties, and/or other intellectual property pertaining to methods of characterizing and treating molecular subsets of muscle-invasive bladder cancer.