Between Jul 2021 and Dec 2022, a total of 9 pts were enrolled and received SHR-2554...Loss of INI1 was confirmed in 6 (66.7%) pts. 5 (55.6%) pts remained progression-free at 12 weeks, which allowing to move on to stage 2. Based on investigator assessments, one (11.1%) of 9 pts had a confirmed partial response at data cutoff. The median progression-free survival was 3.8 months (95% CI: 1.2–NA)...Based on investigator assessments, one (11.1%) of 9 pts had a confirmed partial response at data cutoff. The median progression-free survival was 3.8 months (95% CI: 1.2–NA)...