title: Value of MRCP using oral Gd-DTPA as negative contrast materials in diagnosis of atypical juxtapapillary duodenal diverticulum.
abstract: OBJECTIVE
  To investigate value of magnetic resonance cholangiopancreatography (MRCP) using oral diluted gadolinium (Gd)-diethylenetriamine penta-acetic acid (DTPA) as negative contrast materials in diagnosis of juxtapapillary duodenal diverticulum with atypical imaging features.
  
  
  METHODS
  Nineteen patients with juxtapapillary duodenal diverticula of which imaging findings were atypical underwent MRCP using oral diluted Gd-DTPA as negative contrast materials after conventional MRCP without any oral contrast materials.
  
  
  RESULTS
  Twenty diverticula were revealed in the 19 patients. At conventional MRCP, the diverticula appeared as rounded lesion with high signal intensity. After oral administration of diluted Gd-DTPA, they disappeared at MRCP. These entities were diagnosed as duodenal diverticula for they communicate with duodenal lumen.
  
  
  CONCLUSIONS
  MRCP using oral Gd-DTPA as negative contrast materials can be helpful in obtaining definitive diagnosis of those juxtapapillary duodenal diverticula without typical imaging features.
authors.affiliation: Department of Radiology, Shenzhen People's Hospital, Second Clinical College, Jinan University, Shenzhen, 518020 Guangdong Province, P.R. China. jshgong@sina.com
authors.forename: Jingshan
authors.initials: J
authors.lastname: Gong
authors.forename: Hong
authors.initials: H
authors.lastname: Zhao
authors.forename: Te
authors.initials: T
authors.lastname: Liu
authors.forename: Rennan
authors.initials: R
authors.lastname: Ling
authors.forename: Jianmin
authors.initials: J
authors.lastname: Xu
mesh_terms: D000284:Administration, Oral; D000368:Aged; D049448:Cholangiopancreatography, Magnetic Resonance / Q000379:methods*; D003287:Contrast Media / Q000008:administration & dosage; D004240:Diverticulum / Q000473:pathology*; D004378:Duodenal Diseases / Q000473:pathology*; D005260:Female; D019786:Gadolinium DTPA / Q000008:administration & dosage*; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D003287:Contrast Media; D019786:Gadolinium DTPA