OncoAlert 4Sight Abstracts to be Presented at #ESMO26 Watch-and-Wait Strategy for Dostarlimab in Localized dMMR/MSI-H Gastroesophageal Adenocarcinoma: Results From the First Interim Analysis of the GERCOR-GONO DEWI Phase II Study 🔬 Phase II, first interim analysis (24 evaluable patients): dostarlimab with a watch-and-wait strategy in localized dMMR/MSI-H gastroesophageal adenocarcinoma. Primary endpoint: 1-year cCR without surgery. ➡️ 1-year cCR: 62.5% (15/24) ➡️ No relapse or death in patients with 1-year cCR (median follow-up 16.20 mo) ➡️ Grade 3–4 dostarlimab-related AEs: 21%; 9/24 underwent surgery, all R0 ✅ dostarlimab led to a 62.5% 1-year cCR at the first interim analysis, enabling organ preservation. 🎙️ Thierry André 👥 Christelle de la Fouchardière (4Sight Made from Abstracts publicly available at the ESMO website) @CathyEngMD, @BenWestphalen, @graokane, @NiuSanford, , @GillSharlene, @pashtoonkasi, @DrVilmaPBarcia, @Erman_Akkus, @GIMedOnc, @UOzkerim, @MarioBalsaMD, @p_ciracimd, @DraMartinezLago, @DaisukeKotani, @Aiims1742, @ARosen380, @realbowtiedoc, @KoheiShitara,