title: MR imaging of ampullary carcinomas.
abstract: OBJECTIVE
  The purpose of this study was to demonstrate the appearance of ampullary carcinomas on MR images.
  
  
  METHODS
  Sixteen patients with ampullary carcinomas underwent MR imaging. Tumor detectability, signal intensity of the tumor, and enhancement pattern on dynamic study were analyzed. MR cholangiopancreatography (MRCP) findings were assessed and were compared with the endoscopic retrograde cholangiopancreatography (ERCP) findings.
  
  
  RESULTS
  Signal intensities of the tumor on each image were various. Dynamic study detected all tumors except one, and all detected tumors showed delayed enhancement. MRCP delineated more than half of the tumors as a filling defect within the duodenal fluid and clearly demonstrated pancreaticobiliary ductal.
  
  
  CONCLUSIONS
  Dynamic study is mandatory in diagnosing ampullary carcinoma, because it can depict most of the tumors, and delayed enhancement of such tumors is characteristic in case of ampullary carcinoma. MRCP can provide reliable information about pancreaticobiliary duct and it can replace diagnostic ERCP.
authors.affiliation: Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan. irie@med.kyushu-u.ac.jp
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Irie
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Honda
authors.forename: Kenji
authors.initials: K
authors.lastname: Shinozaki
authors.forename: Kengo
authors.initials: K
authors.lastname: Yoshimitsu
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Aibe
authors.forename: Akihiro
authors.initials: A
authors.lastname: Nishie
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Nakayama
authors.forename: Kouji
authors.initials: K
authors.lastname: Masuda
mesh_terms: D000368:Aged; D014670:Ampulla of Vater / Q000473:pathology*; D003138:Common Bile Duct Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged