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- W2794091331 abstract "414 Background: Nivolumab has shown efficacy and acceptable safety in 2 open-label, multicenter studies (CheckMate 032 and 275) and is approved for patients (pts) with metastatic urothelial carcinoma (mUC) after ≥1 platinum-based therapy. Here we report longer-term efficacy and safety results for pts with mUC in the phase 1/2 CheckMate 032 study who received nivolumab monotherapy based on > 2 years of follow-up. Methods: Pts with mUC, regardless of programmed death-1 ligand 1 (PD-L1) expression status, received nivolumab 3 mg/kg intravenously every 2 weeks until progression or discontinuation. Tumor PD-L1 membrane expression was assessed with Dako PD-L1 immunohistochemical staining. Primary endpoint: objective response rate (ORR; RECIST 1.1); other endpoints: safety, progression-free survival (PFS), overall survival (OS), and duration of response. Results: Of 78 treated pts (median age 65.5 years; range, 31-85), 52 (66.7%) had received ≥2 prior therapies. At a minimum follow-up of 24 months, 11 pts (14.1%) remain on treatment. Treatment discontinuation was mainly due to disease progression (52 pts [66.7%]). Tumor PD-L1 expression was evaluable in 68 pts (87.2%); 26 (38.2%) pts had ≥1% and 42 (61.8%) had < 1% expression. The table shows overall efficacy. Updated ORR was 25.6%, with 1 additional complete response (CR) achieved for a CR rate of 8%. Median duration of response was not reached. ORR, 1- and 2-year PFS and OS rates were similar between the PD-L1 < 1% and > 1% subsets. Grade 3 or 4 treatment-related adverse events (TRAEs) occurred in 22 pts (28.2%); most frequent were ↑lipase (6.4%), ↑amylase (5.1%), and maculopapular rash (3.8%). One pt had a grade 5 TRAE (pneumonitis). Conclusions: Nivolumab showed clinically meaningful, durable efficacy with promising long-term survival regardless of PD-L1 expression, and no new toxicity signals with longer-term follow-up in previously treated pts with mUC. Clinical trial information: NCT01928394. [Table: see text]" @default.
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- W2794091331 date "2018-02-20" @default.
- W2794091331 modified "2023-09-25" @default.
- W2794091331 title "Nivolumab monotherapy in metastatic urothelial carcinoma: Longer-term efficacy and safety results from the CheckMate 032 study." @default.
- W2794091331 doi "https://doi.org/10.1200/jco.2018.36.6_suppl.414" @default.
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