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[A Case of Advanced Gastric Cancer with Synchronous Liver Metastases Responding to Preoperative Combination Chemotherapy with S-1 plus Oxaliplatin(SOX)].

A 67-year-old man was admitted to our hospital because of anemia and weight loss, and diagnosed with a type 3 tumor in the upper gastric body. Pathological examination suggested moderately differentiated adenocarcinoma with immunohistochemically negative staining for HER2. Abdominal CT revealed thickening of the gastric wall and multiple liver metastases. The clinical findings suggested Stage IV disease(T4aN0M1). Chemotherapy was administered with a combination of S-1 plus CDDP(SP). However, the level of CEA(ng/mL)increased from 49.2 to 634.6, and the treatment schedule was changed to a combination of S-1 plus oxaliplatin(SOX). After 3 courses of the SOX regimen, abdominal CT showed a reduction of liver metastases and the level of CEA decreased to 8.4 ng/mL. We performed total gastrectomy with D1 lymph node dissection in September 2016. Post-operative pathological findings were ypStage IV (T3N0M1)and chemotherapeutic effect was grade 2. CT scan revealed regrowth of the tumor in S2 3 months after the operation. The patient underwent transcatheter arterial chemoembolization(TACE)followed by a regimen of paclitaxel plus ramucirumab(PTX/RAM). At present, he is being treated with the PTX/RAM regimen in the outpatient department with no signs of tumor growth. Although the prognosis of gastric cancer with synchronous liver metastases is very poor, it is possible for survival to be prolonged with multimodality therapy.