Abstract
The patient was a 73-year-old man with advanced gastric cancer. Because of invasion to pancreas, we initiated neoadjuvant chemotherapy (NAC) with S-1 and cisplatin (CDDP), and anticipated down-staging of the tumor. After 3 cycles of this regimen, we performed a total gastrectomy with lymph node dissection (D2). Microscopic findings revealed remarkable fibrous changes and no cancer cells in the gastric wall and lymph nodes, which were judged to be a Grade 3 effect (Complete response). This case suggested that S-1/CDDP combination chemotherapy may be useful in treating patients with advanced gastric cancer.