title: Linear endoscopic ultrasonography vs magnetic resonance imaging in ampullary tumors.
abstract: OBJECTIVE
  To assess linear endoscopic ultrasound (L-EUS) and magnetic resonance imaging (MRI) in biliary tract dilation and suspect small ampullary tumor.
  
  
  METHODS
  L-EUS and MRI data were compared in 24 patients with small ampullary tumors; all with subsequent histological confirmation. Data were collected prospectively and the accuracy of detection, histological characterization and N staging were assessed retrospectively using the results of surgical or endoscopic treatment as a benchmark.
  
  
  RESULTS
  A suspicion of ampullary tumor was present in 75% of MRI and all L-EUS examinations, with 80% agreement between EUS and histological findings at endoscopy. However, L-EUS and histological TN staging at surgery showed moderate agreement (κ = 0.54).
  
  
  CONCLUSIONS
  L-EUS could be a useful adjunct as a diagnostic tool in the evaluation of patients with suspected ampullary tumors.
authors.affiliation: Gastroenterology and Endoscopy Unit, Nuovo Ospedale Civile Sant'Agostino Estense, Viale Giardini 1355, 41121 Baggiovara, Modena, Italy. r.manta@libero.it
authors.forename: Raffaele
authors.initials: R
authors.lastname: Manta
authors.forename: Rita
authors.initials: R
authors.lastname: Conigliaro
authors.forename: Danilo
authors.initials: D
authors.lastname: Castellani
authors.forename: Alessandro
authors.initials: A
authors.lastname: Messerotti
authors.forename: Helga
authors.initials: H
authors.lastname: Bertani
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Sabatino
authors.forename: Elena
authors.initials: E
authors.lastname: Vetruccio
authors.forename: Luisa
authors.initials: L
authors.lastname: Losi
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Villanacci
authors.forename: Gabrio
authors.initials: G
authors.lastname: Bassotti
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D000236:Adenoma / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014670:Ampulla of Vater / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000601:surgery; D016009:Chi-Square Distribution; D003138:Common Bile Duct Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D019160:Endosonography; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D012680:Sensitivity and Specificity