title: Cystic malformation of cystic duct: 10 cases and review of literature.
abstract: OBJECTIVE
  To evaluate cystic malformations of the cystic duct.
  
  
  METHODS
  Over a 2-year period, we came across 10 cases of cystic malformation of the cystic duct among patients who were investigated in our radiology department with ultrasonography, multidetector computed tomography, or magnetic resonance imaging for abdominal complaints. Radiological diagnosis of cystic malformation of the cystic duct was made on the basis of a dilated, nonvascular cystic structure near the porta hepatis, and visualization of a clear communication with either the gallbladder, normal caliber cystic duct and/or common bile duct (CBD) on at least one imaging modality.
  
  
  RESULTS
  Four of 10 patients had saccular dilatation of the cystic duct. Six patients had fusiform dilatation of the cystic duct, and two of these had only mild fusiform dilatation. Two patients had associated CBD dilatation and one had associated cystic duct calculi and malignancy.
  
  
  CONCLUSIONS
  Cystic malformations of the cystic duct should be recognized as a distinct type of choledochal cyst and should be added as type VI cyst in Todani's classification.
authors.affiliation: Praveen Maheshwari, Department of Radiology, NMC Speciality Hospital, AbuDhabi, United Arab Emirates.
authors.forename: Praveen
authors.initials: P
authors.lastname: Maheshwari