Benign biliary stricture

Refers to bile duct injury and scarring narrowing of the bile duct caused by recurrent cholangitis. Can be caused by iatrogenic injury, abdominal trauma, bile duct stones, infection. Due to repeated inflammation and bile salt stimulation of affected bile ducts, fibrous tissue hyperplasia, thickened tube walls, and narrowed bile duct lumen. Then the pathological and clinical manifestations of biliary obstruction and infection appeared.