Most common cause of biliary stricture is
CBD stone
Trauma
Asiatic cholangitis
Congenital
Most common cause of benign biliary stricture is laparoscopic cholecytectomy I.e., operative trauma Incidence of bile duct injury during laparoscopic cholecystectomy is 0.3-0.85 % Ref:Sabiston 20th edition Pgno :1502
G.I.T