Impacted gallstone in cystic duct or neck of gallbladder resulting in obstruction and jaundice
Either direct extrinsic compression by a stone or fibrosis from chronic cholecystitis
Can result in cholecystocholedochal fistula


Type I = no fistula
- IA = cystic duct present
- IB = obliterated cystic duct
Types II-IV = with fistula
- II =  defect <33% of CBD
- III = 33-66% of CBD
- IV = >66%


Presents with obstructive jaundice or cholangitis
CT/US confirm diagnosis
ERCP to define anatomy and +/- stent prior to surgery

Managed by cholecystectomy for type I, may need a t-tube
II-IV = open cholectystectomy and Roux-en-Y hepaticojejunostomy.