[A Case of Pancreatic Cancer Treated with Carbon Ion Radiotherapy for Oligohepatic Metastatic Recurrence after Conversion Surgery].

Although systemic chemotherapy is the mainstay of treatment for metastatic recurrence of pancreatic cancer, in recent years, with the improvement of chemotherapy, some cases have been reported as long-term survival by multidisciplinary.We report a case of pancreatic cancer with superior mesenteric artery invasion treated with chemotherapy and carbon-ion radiotherapy(CIRT)followed by conversion surgery(CS).CIRT was successfully re-introduced for hepatic oligometastatic recurrence that appeared 1 year after CS.Disease control was obtained and continued at 6 months after CIRT for the liver, suggesting that multidisciplinary treatment including CIRT might be promising strategy for hepatic oligometastases if the primary tumor is under control.