title: MR cholangiography in the evaluation of neonatal cholestasis: initial results.
abstract: OBJECTIVE
  To retrospectively analyze prospective magnetic resonance (MR) cholangiographic interpretations of findings and compare them with clinical outcome and to determine the accuracy of MR cholangiography in depicting extrahepatic biliary atresia and helping to distinguish it from other causes of neonatal jaundice.
  
  
  METHODS
  Twenty-six infants (15 male, 11 female; median age, 2 months) underwent MR cholangiography with a 1.5-T MR imaging unit. Original interpretations were compared with clinical outcome. Statistical analysis was performed to determine the accuracy of MR cholangiography in depicting extrahepatic biliary atresia. Equivocal cases and any cases lost to follow-up were excluded.
  
  
  RESULTS
  Findings in six of 26 infants were interpreted as normal, and none of five patients (one lost to follow-up) had biliary atresia or other surgical lesions; two were abnormal but not suggestive of biliary atresia (one false-negative finding); 12 were consistent with biliary atresia (three false-positive findings); four demonstrated a choledochal cyst; and two were equivocal. MR cholangiography accuracy was 82% (19 of 23); sensitivity, 90% (nine of 10); and specificity, 77% (10 of 13) for the detection of extrahepatic biliary atresia, with a positive predictive value of 75% (nine of 12) and a negative predictive value of 91% (10 of 11).
  
  
  CONCLUSIONS
  Results of this study found that MR cholangiography is 82% accurate, 90% sensitive, and 77% specific for depicting extrahepatic biliary atresia. Contrary to previous reports, false-positive and false-negative findings occur at MR cholangiography.
authors.affiliation: Department of Radiology, Mount Sinai School of Medicine, 1 Gustave L Levy Pl, Box 1234, New York, NY 10029, USA. karen.norton@msnyuhealth.org
authors.forename: Karen I
authors.initials: KI
authors.lastname: Norton
authors.forename: Ronald B
authors.initials: RB
authors.lastname: Glass
authors.forename: Debora
authors.initials: D
authors.lastname: Kogan
authors.forename: Jacob S
authors.initials: JS
authors.lastname: Lee
authors.forename: Sukru
authors.initials: S
authors.lastname: Emre
authors.forename: Benjamin L
authors.initials: BL
authors.lastname: Shneider
mesh_terms: D001652:Bile Ducts / Q000473:pathology*; D001653:Bile Ducts, Intrahepatic / Q000473:pathology; D001656:Biliary Atresia / Q000150:complications / Q000175:diagnosis; D015529:Choledochal Cyst / Q000150:complications / Q000175:diagnosis; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007567:Jaundice, Neonatal / Q000175:diagnosis* / Q000209:etiology; D008297:Male; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D012680:Sensitivity and Specificity