The U.S. Food and Drug Administration is alerting health care professionals, oncology clinical investigators, and the public about decreased survival associated with the use of pembrolizumab or atezolizumab as single therapy (monotherapy) in clinical trials to treat patients with metastatic urothelial cancer who have not received prior therapy and who have low expression of the protein programmed death ligand 1 (PD-L1).
In two ongoing clinical trials (KEYNOTE-361 and IMVIGOR-130), the Data Monitoring Committees’ (DMC) early reviews found patients in the monotherapy arms of both trials with PD-L1 low status had decreased survival compared to patients who received cisplatin- or carboplatin-based chemotherapy.
