Fig. 2.

Cholangiographic categorization of extrahepatic duct strictures according to location of distal margin of stricture within the bile duct and relationship with the angulation of the extrahepatic duct. (A) a stricture located within 3 cm of the ampulla (type A); (B) a stricture located more than 3 cm above the ampulla and at or below the bending portion (Type B); (C) a stricture located above the bending portion but within 3 cm of the bending portion (type C); (D) a stricture located over 3 cm from the bending portion (type D)