title: Classifying choledochal cysts using hepatobiliary scintigraphy.
abstract: OBJECTIVE
  This retrospective study was designed to classify choledochal cysts on the basis of the findings of hepatobiliary scintigraphy.
  
  
  METHODS
  Twenty-one patients with choledochal cysts (15 female, 6 male; mean age, 20 years) proved on the findings of endoscopic retrograde cholangiopancreatography (ERCP) or surgery and histopathologic analysis were included in the study. Two nuclear medicine physicians, blinded with regard to cholangiographic and operative details, were asked to review and to classify the type of choledochal cyst seen on the hepatobiliary scan. Later, scintigraphic results were compared with ERCP and surgical findings for a reference standard.
  
  
  RESULTS
  The findings of hepatobiliary scintigraphy correlated with ERCP and surgical findings in 18 of 21 cases (86%). Scintiscans correctly identified all type 1 cysts (12/12). The sensitivity of scintigraphy in diagnosing type 4 cysts was 66% (6 of 9 cases). It underestimated the intrahepatic extent of disease in type 4a biliary cysts (37%).
  
  
  CONCLUSIONS
  This study illustrates the utility of hepatobiliary scintigraphy in diagnosing type 1 and 4 choledochal cysts.
authors: Department of Nuclear Medicine, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, Utter Pradesh, India.
authors: A
authors: A
authors: Rajnish
authors: S
authors: S
authors: Gambhir
authors: B K
authors: BK
authors: Das
authors: R
authors: R
authors: Saxena
mesh_terms: D000328:Adult; D002758:Cholangiography; D002760:Cholangiopancreatography, Endoscopic Retrograde; D015529:Choledochal Cyst / Q000145:classification / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male; D011877:Radionuclide Imaging; D012189:Retrospective Studies; D012680:Sensitivity and Specificity