Benign biliary stricture

Benign biliary stricture refers to cicatricial narrowing of the bile duct lumen caused by bile duct injury and recurrent cholangitis. It can be caused by iatrogenic injury, abdominal trauma, bile duct stones, and infection. The affected bile duct, due to repeated inflammation and bile salt stimulation, leads to fibrous tissue proliferation, thickening of the duct wall, and narrowing of the bile duct lumen, subsequently resulting in the pathological and clinical manifestations of biliary obstruction and infection.