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[A case of Stage IV AFP producing gastric cancer with long-term survival treated by adjuvant chemotherapy with S-1].

A 66-year-old woman underwent a total gastrectomy for advanced gastric cancer of cardia. The histological diagnosis was moderately-differentiated tubular adenocarcinoma and the pathological Stage was IV: T4 (diaphragm), N2, M0. Microscopically, there were findings of severe lymphatic and venous invasions with intravenous tumor thrombus around the splenic hilum. Immunohistochemical staining confirmed AFP production of the tumor. The risk of recurrence was considered very high and her prognosis very poor. The patient received adjuvant chemotherapy with S-1. There was no finding of recurrence in the series of postoperative follow-up examinations. Previous reports describe the prognosis of AFP producing gastric cancer as very poor. In several cases, however, aggressive treatments for AFP producing gastric cancer may result in a better prognosis. This is a long survival case of AFP producing gastric cancer successfully treated with S-1 after surgery.