Efficacy and Safety of Minimally Invasive D2+PAND Gastrectomy for Gastric Cancer With PAN Metastasis After Conversion Immunochemotherapy

Thirty patients with HER2-negative gastric adenocarcinoma or gastroesophageal junction (GEJ) cancer, presenting with PAN metastasis (No. 16 lymph nodes ≥10 mm), will be enrolled. Participants will receive four cycles of conversion immunochemotherapy with a PD-1 inhibitor (Serplulimab) combined with the SOX chemotherapy regimen (oxaliplatin and S-1). After completion of conversion therapy, patients will undergo curative minimally invasive (laparoscopic or robotic) gastrectomy with D2+PAND lymphadenectomy.