Inclusion Criteria:  Radiological diagnosis (with or without pathological diagnosis) of a malignant obstruction of the borderline resectable distal bile ducts, locally advanced or unresectable distal to the hilum, at a minimum distance of 2 cm. Resectability based on tumor staging after axial imaging and evaluation by a physician (surgeon, oncologist and / or gastroenterologist). High results of the liver function test with a serum bilirubin level at least 3 times above the upper limit of normal (18.9 μmol / L) Dilated extrahepatic bile duct measuring at least 1.2 cm in axial imaging, ultrasound or endoscopy. Karnofsky index> 30% ASA score <IV Patient accepting the constraints of research Patient affiliated or beneficiary of a social security scheme Patient having signed an informed consent  Exclusion Criteria:  - Hilar obstruction (biliary obstruction located <2 cm from the hilum) Coagulopathy and / or thrombocytopenia that cannot be corrected Age <18 years old Liver metastases involving> 30% of hepatic volume Liver cirrhosis with portal hypertension or ascites Biliary sphincterotomy or placement of a stent performed in the past Anatomy modified by surgery Common bile ducts measuring less than 1.2 cm will be excluded. Patient with clinical and radiological signs of stenosis of the gastric outlet Patient participating in another clinical study Protected patient: adult under guardianship, curatorship or other legal protection, deprived of liberty by judicial or administrative decision Pregnant, breastfeeding or parturient woman Patient hospitalized without consent