title: Primary sclerosing cholangitis in children: utility of magnetic resonance cholangiopancreatography.
abstract: BACKGROUND
  Even when histologic findings are highly suggestive of primary sclerosing cholangitis (PSC), cholangiographic correlation is required for the diagnosis. The present gold standard, endoscopic retrograde cholangiopancreatography (ERCP), is invasive and associated with complications.
  
  
  OBJECTIVE
  To evaluate the usefulness of magnetic resonance cholangiopancreatography (MRCP) in diagnosing PSC in children.
  
  
  METHODS
  MRCP studies were retrospectively reviewed in 20 children with clinical suspicion of PSC and who had undergone liver biopsy. MRCP studies were considered positive or negative for PSC depending on the presence or absence of dilatation, irregularity, multifocal strictures and beading of the bile ducts.
  
  
  RESULTS
  Twenty children (14 boys, 6 girls) with an average age of 13 years qualified for the study. Of 19 diagnostic MRCP studies, 16 were called positive and 3 were called negative. An overall diagnosis of PSC-positive was assigned to all 19 patients based on clinical and laboratory findings, biopsy results and cholangiographic data. Based on this overall diagnosis, MRCP was 84% sensitive and accurate to diagnose PSC in children.
  
  
  CONCLUSIONS
  MRCP can be a valuable tool in diagnosing pediatric PSC that can demonstrate major intra- and extrahepatic ducts in most cases. An unequivocally positive MRCP study should not be followed by ERCP for diagnosing PSC in children.
authors.affiliation: Department of Diagnostic Imaging, The Hospital for Sick Children, Toronto, Canada. drgovindchavhan@yahoo.com
authors.forename: Govind B
authors.initials: GB
authors.lastname: Chavhan
authors.forename: Eve
authors.initials: E
authors.lastname: Roberts
authors.forename: Rahim
authors.initials: R
authors.lastname: Moineddin
authors.forename: Paul S
authors.initials: PS
authors.lastname: Babyn
authors.forename: David E
authors.initials: DE
authors.lastname: Manson
mesh_terms: D000293:Adolescent; D001659:Biliary Tract / Q000473:pathology*; D002648:Child; D049448:Cholangiopancreatography, Magnetic Resonance / Q000379:methods*; D015209:Cholangitis, Sclerosing / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008297:Male