To evaluate during a 7 months period the efficacy, safety and accuracy of percutaneous transluminal forceps biopsy combined with transhepatic biliary drainage in patients with biliary stricture

Biological parameters of liver function, histopathology of specimens, comparison with others clinical and pathological data (imaging follow up, percutaneous biopsy, surgical biopsy, endoscopic biopsy) were recorded Comparison between pathological findings of surgery or endoscopy or percutaneous biopsy and specimens coming from biliary forceps biopsy follow up of the patient 12 months after biopsy Evaluation of complications, accuracy

Inclusion Criteria:

• Patients with biliary strictures without histology available

Exclusion Criteria:

• Pregnant patients
• Children

patients with obstructive jaundice referred for percutaneous transhepatic biliary drainage without histological diagnosis