DANTE evaluates perioperative FLOT vs. FLOT/atezolizumab for resectable gastric or GEJ adenocarcinoma. Here, we report preliminary data for the pathological (path) regression in pts with MSI....Rate of path complete regression (TRG1a) was higher in pts with MSI than those with MSS (10/22 pts [46%] vs. 41/173 pts [24%]). Among MSI pts, rates of path complete or subtotal regression (TRG1a/b) were 80% (8/10) after FLOT/atezolizumab vs. 59% (7/12) after FLOT.