Diverticular Choledochal Cyst with a Large Impacted Stone Masquerading as Mirizzi's Syndrome

• Main Authors: Soon Oh Hwang, Tae Hoon Lee, Sang Ho Bae, Dong Jae Han, Han Min Lee, Sang-Heum Park, Chang Ho Kim, Sun-Joo Kim
• Format: Article
• Language: English
• Published: Karger Publishers 2013-03-01
• Series: Case Reports in Gastroenterology
• Subjects: Choledochal cyst; Mirizzi’s syndrome; Cholangitis
• Online Access: http://www.karger.com/Article/FullText/350253

Choledochal cysts are congenital anomalies of the biliary tract manifested by cystic dilatation of the extrahepatic and intrahepatic bile ducts. Choledochal cyst is not rare in far-East Asian countries. Type II choledochal cysts account for 2% of all such cysts. They are true diverticula of the extrahepatic bile duct and communicate with the bile duct through a narrow stalk. This condition is associated with significant complications, such as ductal strictures, stone formation, cholangitis, rupture and secondary biliary cirrhosis. We describe a case of a huge impacted stone in a diverticular choledochal cyst which masqueraded as an unusual cystic duct stone causing Mirizzi's syndrome.