Bile duct narrowing or obstruction

Common: Cholangitis; Choledocholithiasis; Contraction of choledochal sphincter; Hepatic artery chemotherapy; Hepatic artery embolization; Iatrogenic injury; Malignant neoplasm; Pancreatitis; Papillary stenosis; Radiation therapy; Sclerosing cholangitis; Surgical injury; Trauma
Uncommon: Abscess; Adenoma; Advanced hepatocellular disease; AIDS-related cholangiopathy; Amebic liver abscess; Artifact from post-processing technique of MRCP; Ascariasis; Benign neoplasm; Biliary hypoplasia or atresia; Calcified portal vein; Clonorchiasis; Complicated Caroli disease; Congenital membranous diaphragm; Cystadenoma; Debris; Duodenal diverticulum; Fascioliasis; Gastrointestinal stromal tumor; Hepatic artery aneurysm; Hepatic fibrosis-renal cystic disease; Hydatid disease; Iatrogenic biliary stricture; Liver abscess; Liver cyst; Liver neoplasm; Lymphadenopathy in porta hepatis; Metastasis from carcinoma of gallbladder; Metastasis from carcinoma of stomach; Mucus; Myoblastoma; Pancreas cancer metastasis; Papillitis of ampulla; Papilloma; Postbulbar duodenal ulcer with scarring or perforation; Recurrent pyogenic cholangitis; Schistosomiasis; Traumatic stricture