RT Journal Article SR Electronic T1 Three Drugs Approved for Urothelial Carcinoma by FDA JF Cancer Discovery JO Cancer Discov FD American Association for Cancer Research SP 659 OP 660 DO 10.1158/2159-8290.CD-NB2017-071 VO 7 IS 7 YR 2017 UL http://cancerdiscovery.aacrjournals.org/content/7/7/659.abstract AB The FDA has approved one PD-1 checkpoint inhibitor, pembrolizumab, and two PD-L1 checkpoint inhibitors, avelumab and durvalumab, to treat metastatic urothelial carcinoma in patients whose disease continues to progress despite platinum-based chemotherapy. This brings the total number of checkpoint inhibitors for the disease to five, prompting questions about how best to use them.