Abstract
5036 Background: Atezo, which targets PD-L1, is an approved therapy for LA/M urothelial carcinoma based on the IMvigor210 and IMvigor211 trials. The single-arm SAUL study (NCT02928406) showed consistent activity and safety in a broader population, including understudied scenarios, eg pts with renal impairment or other IMvigor211 exclusion criteria. Methods: Pts with LA/M UTC received atezo 1200 mg q3w until disease progression or unacceptable toxicity. The primary endpoint was safety; secondary endpoints included overall response rate (ORR) and overall survival (OS). Post hoc analyses explored outcomes in pts classified as: chemotherapy (CT) ineligible (calculated creatine clearance [CrCl] 15– < 30 mL/min); cisplatin ineligible and carboplatin eligible (CrCl 30– < 60 mL/min); or cisplatin eligible (CrCl ≥60 mL/min). Results: Of 1004 enrolled pts, 46 (5%) were classified as CT ineligible and 420 (42%) as cisplatin ineligible. Results are summarized below. Conclusions: These post hoc analyses suggest pts typically considered cisplatin or CT ineligible are candidates for atezo. Pts with renal impairment achieved similar ORR and DCR to pts with CrCl ≥60 mL/min, without increased toxicity. Imbalances in pt characteristics may explain numerical differences in OS. Clinical trial information: NCT02928406 . [Table: see text]
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