EXIBIT: Oxaliplatin in Biliary Tract Cancer

* Histologically proven, locally advanced or metastatic carcinoma of the biliary tract (gallbladder, intrahepatic bile ducts, extrahepatic bile ducts, ampula of Vater) * For intrahepatic bile ducts, if the diagnosis of biliary tract origin is not evident by imaging or surgical exploration, and so equivalent to liver metastasis with unknown primary site, inclusion is possible if: * unknown primary after an exhaustive search for the primary site (chest radiography- , thoracic and abdomino pelvic CT scan, colonoscopy, oesogastroduodenal endoscopy, PSA determination for men or mammography for women, and PET scan if possible). * histological examination compatible with adenocarcinoma of bile ducts with the immunostaining expression of cytokeratin : 7+, 20- and 19 +. (Shimonishi, 2000 \^22) * No prior chemotherapy for advanced disease (first line) * No radiation therapy within 4 weeks prior to the first gemcitabine administration. * Unidimensionally measurable disease. * For female patient of childbearing potential, neither pregnant nor breastfeeding, and under active contraception * No known allergy to one of the study drugs * No prior malignancy * No CNS metastases * No peripheral neuropathy \> grade 2 * ECOG PS \<=2 * ANC \> 1.5 X 10\^9 /L * Platelets \> 100 X 10\^9 /L * Creatinine \< 1.5 x ULN * SGPT (ALT) \< 5 x ULN * Bilirubin \< 2.5 x ULN (patients with jaundice or evidence of bile duct obstruction and in whom the biliary tree can be decompressed by endoscopic percutaneous endoprothesis, with subsequent reduction in bilirubin \< 2.5 x ULN will be eligible for the study).