title: Wire-guided intraduodenal ultrasonography using a catheter probe in the differential diagnosis of enlarged ampullary lesions.
abstract: OBJECTIVE
  It can be difficult to identify the cause of an enlarged ampulla of Vater (AOV). This study evaluated the accuracy of wire-guided intraduodenal ultrasonography (US) for the differential diagnosis of an enlarged AOV during endoscopic retrograde cholangiopancreatography (ERCP).
  
  
  METHODS
  Thirty-four patients with enlarged AOVs of unknown cause identified on imaging studies or endoscopic observations underwent wire-guided intraduodenal US using a catheter probe.
  
  
  RESULTS
  The final diagnoses were malignant or premalignant tumors in 10 patients (29.4%), stones in nine patients (26.5%), inflammation in 14 patients (41.2%), and cyst in one patient (2.9%). The overall diagnostic accuracy of intraduodenal US for enlarged AOVs was 91.2%. The diagnostic accuracies of stones, inflammation, and AOV tumors were 100.0%, 94.1%, and 91.1%, respectively.
  
  
  CONCLUSIONS
  Wire-guided intraduodenal US using a catheter probe is readily applicable during ERCP and may be useful in the differential diagnosis of enlarged ampullary lesions.
authors.affiliation: Digestive Disease Center and Research Institute, Departments of Internal Medicine, SoonChunHyang University School of Medicine, Bucheon and Seoul, Korea.
authors.forename: Shin Hee
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Digestive Disease Center and Research Institute, Departments of Internal Medicine, SoonChunHyang University School of Medicine, Bucheon and Seoul, Korea.
authors.forename: Jong Ho
authors.initials: JH
authors.lastname: Moon
authors.affiliation: Digestive Disease Center and Research Institute, Departments of Internal Medicine, SoonChunHyang University School of Medicine, Bucheon and Seoul, Korea.
authors.forename: Yun Nah
authors.initials: YN
authors.lastname: Lee
authors.affiliation: Digestive Disease Center and Research Institute, Departments of Internal Medicine, SoonChunHyang University School of Medicine, Bucheon and Seoul, Korea.
authors.forename: Hyun Jong
authors.initials: HJ
authors.lastname: Choi
authors.affiliation: Department of Pathology, SoonChunHyang University School of Medicine, Bucheon and Seoul, Korea.
authors.forename: Hee Kyung
authors.initials: HK
authors.lastname: Kim
authors.affiliation: Digestive Disease Center and Research Institute, Departments of Internal Medicine, SoonChunHyang University School of Medicine, Bucheon and Seoul, Korea.
authors.forename: Moon Han
authors.initials: MH
authors.lastname: Choi
authors.affiliation: Digestive Disease Center and Research Institute, Departments of Internal Medicine, SoonChunHyang University School of Medicine, Bucheon and Seoul, Korea.
authors.forename: Tae Hoon
authors.initials: TH
authors.lastname: Lee
authors.affiliation: Digestive Disease Center and Research Institute, Departments of Internal Medicine, SoonChunHyang University School of Medicine, Bucheon and Seoul, Korea.
authors.forename: Sang Woo
authors.initials: SW
authors.lastname: Cha
authors.affiliation: Department of Radiology, SoonChunHyang University School of Medicine, Bucheon and Seoul, Korea.
authors.forename: Seo-Youn
authors.initials: SY
authors.lastname: Choi
authors.affiliation: Department of Radiology, SoonChunHyang University School of Medicine, Bucheon and Seoul, Korea.
authors.forename: Hae Kyung
authors.initials: HK
authors.lastname: Lee
mesh_terms: D000328:Adult; D000368:Aged; D014670:Ampulla of Vater / Q000000981:diagnostic imaging* / Q000473:pathology*; D057785:Catheters; D002760:Cholangiopancreatography, Endoscopic Retrograde; D003138:Common Bile Duct Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology*; D003937:Diagnosis, Differential; D004384:Duodenoscopy; D019160:Endosonography / Q000295:instrumentation* / Q000379:methods*; D005260:Female; D006801:Humans; D006984:Hypertrophy / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged
keywords: ampulla of Vater; catheter probe; intraduodenal ultrasonography