Perioperative Chemotherapy With Herceptin For Potentially Resectable HER-2 Positive Gastric Cancer With Liver Metastasis

Stage I：preoperative therapy * Capecitabine plus oxaliplatin with herceptin is superior to surgery alone for patients with potentially resectable HER-2 positive gastric cancer with liver metastasis; Stage II: Perioperative therapy * Perioperative Capecitabine plus oxaliplatin with herceptin is superior to adjuvant Capecitabine plus oxaliplatin alone for patients with potentially resectable HER-2 positive gastric cancer with liver metastasis;