Neoadjuvant Immunochemotherapy in Locally Advanced Esophagogastric Junction Adenocarcinoma

Sintilimab 200mg iv drip. Qd D1 + Oxaliplatin 130/m2 iv drip. Qd D1 + Tegafur (Gimeracil and Oteracil Potassium Capsules) \[40mg/m2 if BSA \<1.25m2, 50mg/m2 if BSA ≥1.25m2 \& \<1.5m2, 60mg/m2 if BSA ≥1.5m2\] po. Bid D1-14 for three cycles