Inclusion Criteria:  both sex above age of 20 years old patients presented with jaundice , pain and fever due to lower common bile duct stricture evident by abdominal imaging (Abdominal US ,MRCP) and confirmed by endoscopic retrograde cholangiopancreatography ( ERCP) patients presented to sohag university hospital.  Exclusion Criteria:  Already diagnosed lower CBD strictures i.e known cause like visible pancreatic mass with visible metastasis or common bile duct stones. Coagulopathy INR more than 1.5 or thrombocytopenia platelet less than 50,000/ml. Proximal common bile duct stricture "above level of cystic duct".