FOLFIRI as Salvage Treatment in Metastatic Biliary Tract Cancer (BTC) Patients Who Were Failed After Gemcitabine Containing Chemotherapy: A Phase II Single Arm Prospective Study

Inclusion Criteria: Provision of a signed written informed consent Age ≥ 20 Histologically or cytologically confirmed carcinoma of biliary tract Progression after treatment with first line gemcitabine-based chemotherapy ECOG performance status of 0\~2 Measurable lesion per RECIST 1.1 criteria Expected life expectancy ≥ 3months Adequate marrow, hepatic, renal and cardiac functions Negative pregnancy test within 28 days Available archival tissue or fresh biopsy Exclusion Criteria: Poor performance statue Previous treatment history of irinotecan Hypersensitivity to irinotecan Other primary cancer except properly treated non-melanoma skin cancer, cured cervix carcinoma in situ and other cured solid tumor without evidence of recurrence after 5 years of curative treatment. Severe co-morbid illness and/or active infections Any other clinical trial therapeutics within 14 days Any anti-cancer therapy within 3 weeks prior to initiation of study treatment (radiotherapy, systemic chemotherapy) CTCAE grade 2 or more adverse events remained Intestinal obstruction or CTCAE grade 3-4 upper GI bleeding within 4 weeks QTcB \> 480msec or family history of QT prolongation Current heart problem such as: pooly controlled hypertension cardiomyopathy, clinically significant valvular heart disease, uncontrolled angina, acute coronary syndrome within 6 months. Severe, uncontrolled systemic disease, active infection such as HBV, HCV or HIV, active bleeding tendency or history of organ transplantation