[A Case of Radical Resection of an Initially Unresectable Intrahepatic Cholangiocarcinoma with Lymph Node Metastasis Invading the Proper Hepatic Artery-Made Possible by the Effective Impact of Preoperative Chemotherapy].

A 57-year-old man was diagnosed with an intrahepatic cholangiocarcinoma(ICC)located at segment 4, attached to the hilar bile ducts, with metastasis of the lymph nodes bordering the right hepatic artery. The ICC was unresectable, and chemotherapy with GCS was administered for 7 months. Although the primary tumor site did not change after the chemotherapy, the lymph nodes shrunk slightly and we decided to perform conversion surgery(CS). Radical resection by means of a left hepatectomy was safely performed, and the metastasis of lymph nodes were dissected from the right hepatic artery. Although the surgical indication for CS under chemotherapy for unresectable ICC is controversial, we herein report a successful case.