[A Case of Unresectable Advanced Gastric Cancer Treated by Seven Courses of Chemotherapy with Docetaxel, Cisplatin, and S-1Followed by Conversion Surgery Achieved Five Year Relapse Free Survival].

The patient is a 51-year-old man.Upper gastrointestinal endoscopy revealed gigantic type 3 gastric cancer.Enhanced abdominal CT demonstrated a gigantic mass of 15×7 cm in the stomach, and a large number of peritoneal dissemination with moderate amount of ascites.The patient was diagnosed with cT4aN3bM1(peritoneal dissemination), Stage IV gastric cancer(JPN ver8)and was treated by chemotherapy with docetaxel(40mg/m / 2 day 1)plus cisplatin(60mg/m2 day 1)plus S-1(80mg/m2 day 1-14).After 7 courses of chemotherapy, peritoneal dissemination was disappeared.The patient received total gastrectomy and D2 lymphadenectomy as a conversion surgery.The pathological findings revealed a T0N0M0, stage 0; the tumor was determined to be Grade 3 owing to the chemotherapeutic effect.Without postoperative adjuvant therapy, the patient is alive without recurrence at the 5 years follow-up after operation.