[A case of effective treatment with S-1/gemcitabine chemotherapy and resection for advanced pancreatic cancer with peritoneal dissemination].

A 69-year-old man was admitted to our hospital for abdominal pain. An abdominal computed tomography(CT)scan revealed pancreatictail cancer with peritoneal dissemination. We administered systemic chemotherapy consisting of S-1 and gemcitabine. After 10 courses, the peritoneal dissemination had disappeared and tumor marker levels returned to almost normal values. Thus, we considered the patient to have an effective response, so we performed a distalpancreatectomy and partial resection of the stomach, transverse colon, and left adrenal gland. Eleven months after the operation, the patient is alive with no recurrence.