[Pathological Complete Response in a Case of Advanced Gastric Cancer with Para-Aortic Lymph Nodes Metastasis Treated by Preoperative Chemotherapy with S-1 and Oxaliplatin(SOX Therapy)].

The patient was a 73-year-old man, diagnosed as advanced gastric cancer with para-aortic lymph nodes(PAN)metastasis. He was treated by 3 courses of neoadjuvant chemotherapy(NAC)with S-1 and oxaliplatin(SOX therapy). CT showed significant reduction of both primary tumor and metastatic lymph nodes. We performed distal gastrectomy with D2 plus PAN dissection. The histopathological findings showed no residual viable tumor cell. The pathological effect of chemotherapy was judged Grade 3(pCR)in both primary tumor and dissected lymph nodes. He is alive without recurrence 21 months after surgery.