Type II choledochal cyst is characterized by which feature?

Type II choledochal cyst is characterized by which feature?

• A. Fusiform dilation of CBD
• B. Stricture of CBD
• C. Cystic dilation of CHD
• D. Diverticulum of CBD

Answer: (D)

Type II choledochal cysts are true diverticula of the common bile duct. They present as a small, solitary sac that protrudes from the CBD and communicates with it through a narrow neck. This outpouching is distinct from other types that show diffuse or intraductal dilation, such as fusiform dilation of the CBD seen in Type I or dilation confined to the intrahepatic or intraduodenal portions. Imaging often reveals a cystic lesion adjacent to the CBD with a connection to the duct, which is the key clue. Surgical management typically involves excision of the diverticulum with reconstruction of the biliary tract.

Type II choledochal cysts are true diverticula of the common bile duct. They present as a small, solitary sac that protrudes from the CBD and communicates with it through a narrow neck. This outpouching is distinct from other types that show diffuse or intraductal dilation, such as fusiform dilation of the CBD seen in Type I or dilation confined to the intrahepatic or intraduodenal portions. Imaging often reveals a cystic lesion adjacent to the CBD with a connection to the duct, which is the key clue. Surgical management typically involves excision of the diverticulum with reconstruction of the biliary tract.