The study will evaluate the results of endoscopic treatment of NON-anastomotic biliary strictures following liver transplantation

Inclusion Criteria:

• Age > 18
• Non anastomotic biliary strictures diagnosed by direct cholangiogram (T-tube) or MRCP
• Stricture involving the hepatic hilum until secondary branches
• Increase of liver function tests
• Signature of the informed consent

Exclusion Criteria:

• Previopus endoscopic or percutaneous treatments
• Patient candidate to metal stents placement
• Previous surgery resulting in altered anatomy

Patients that underwent liver transplantation and has a diagnosis of biliary strictures secondary to ischemic cholangiopaty (biliary stenoses involving bile ducts of the donor and extending to the hilum)