title: Radiologic features of papillary adenoma and papillomatosis of the biliary tract.
abstract: BACKGROUND
  The purpose of this study was to describe the imaging findings of papillary adenoma of the bile ducts.
  
  
  METHODS
  Imaging modalities including sonography, computed tomography, cholangiography, and endoscopic sonography obtained in five patients with papillary adenoma of the bile duct were retrospectively reviewed and correlated with pathologic findings.
  
  
  RESULTS
  In four cases, imaging findings were a dilatation of the bile ducts due to a protruding mass within the lumen of the common bile duct. In one case, the biliary tract obstruction was not due to the mass but to mucus secretion that was detected at sonography, endoscopic sonography, and cholangiography. Multiple lesions were observed in two cases at pathology and not detected preoperatively. All the lesions contained foci of in situ carcinoma or mild dysplasia.
  
  
  CONCLUSIONS
  Imaging is useful in detecting bile duct tumors. Hypersecretion of mucus is rare but highly characteristic of bile duct adenoma.
authors.affiliation: Department of Radiology, Hôpital Beaujon, F-92118 Clichy Cedex, France.
authors.forename: M
authors.initials: M
authors.lastname: Kawakatsu
authors.forename: V
authors.initials: V
authors.lastname: Vilgrain
authors.forename: M
authors.initials: M
authors.lastname: Zins
authors.forename: M
authors.initials: M
authors.lastname: Vullierme
authors.forename: J
authors.initials: J
authors.lastname: Belghiti
authors.forename: Y
authors.initials: Y
authors.lastname: Menu
mesh_terms: D000236:Adenoma / Q000000981:diagnostic imaging*; D000368:Aged; D001650:Bile Duct Neoplasms / Q000000981:diagnostic imaging*; D002760:Cholangiopancreatography, Endoscopic Retrograde; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010212:Papilloma / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography