Funding Information: This research was partially co-financed by Hospital da Luz Lisboa under the initiative “Luz Investigação” in the context of the Group GENIUS (Reference LH.INV.F2019015).; We investigated the impactof microsatellite instability (MSI) and Epstein–Barr virus (EBV) status in gastric cancer (GC), regarding response to perioperative chemotherapy (POPChT), overall survival (OS), and progression-fr...