Efficacy and Safety of Long-Term Continuous Nirogacestat Treatment in Adults With Desmoid Tumors: Results From the DeFi Trial.

ABSTRACT: In the phase III placebo-controlled DeFi trial (ClinicalTrials.gov identifier: NCT03785964) primary analysis, nirogacestat showed significant improvement versus placebo in progression-free survival (PFS), objective response rate (ORR), and patient-reported outcomes (PRO) in adult patients with progressing desmoid tumors (DT; median [range] exposure: 20.6 [0.3-33.6] months). Here, long-term nirogacestat efficacy and safety were evaluated in patients randomly assigned to nirogacestat and followed through the final data cutoff date of December 19, 2024. End points included PFS and ORR per RECIST v1.1, PRO, and safety. The median (range) duration of exposure was 33.6 (0.3-61.8) months. Median PFS was not reached. The ORR with up to 4 years of nirogacestat treatment was 45.7% (32 of 70), with t

SUBMITTER: Ratan R 

PROVIDER: S-EPMC12634144 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature