[Cystic Duct Cancer with Postoperative Liver Metastasis That Achieved Complete Response after Gemcitabine Treatment - A Case Report].

A 72-year-old woman was diagnosed with gallbladder cancer and underwent extended cholecystectomy and extrahepatic bile duct resection. The pathological findings were CGnBdGb, circ, nodular infiltrating type, 20×10 mm, tub2, pT3b, int, INF c, ly1, v1, ne3, pN0, pDM0, pHM0, pEM0, pPV0, pA0, R0, Stage III A. Because the main localization was in the cystic duct, we diagnosed this as cystic duct cancer. Seven months after surgery, follow-up computed tomography scan revealed a metastatic region in segment 7 of the liver. She underwent chemotherapy with gemcitabine(GEM). After 3 courses of GEM, the metastatic lesion became obscure. After 8 courses, the metastatic lesion disappeared, and the patient showed complete response. We discontinued chemotherapy after 21courses of GEM, and the patient is alive with no signs of recurrence 4 years and 4 months after surgery.