[A case of advanced gastric cancer with regional lymph node metastasis showing pathological complete response after preoperative chemotherapy with docetaxel, cisplatin, and S-1].

A 64-year-old man was diagnosed with advanced gastric cancer type 3 and regional celiac trunk lymph node metastases. We performed preoperative chemotherapy with docetaxel, cisplatin, and S-1(DCS therapy). Total gastrectomy with lymph node dissection was performed after 2 courses of DCS. Pathologically, no viable cells were found in the primary lesion or in the dissected lymph nodes. The pathological response to preoperative DCS therapy was classified as grade 3. The postoperative course was uneventful; the patient is currently healthy and receives periodic medical examinations.