In the overall cohort, PD-L1 positive expression (≥1%) was identified in 31% UPSs (21/67), 29% angiosarcomas (5/17), 26% RMSs (6/24, most of which were of the pleomorphic subtype), 18% MFSs (17/97), 11% LMSs (13/116) and 10% DD-LPS (4/37). This evidence concerns the gene CD274 and angiosarcoma.