title: New technique using intraductal ultrasonography for the diagnosis of bile duct cancer.
abstract: We investigated the extent to which BDca can be visualized and diagnosed via a percutaneous fistula using IDUS. IDUS was performed in 42 cases, including 15 of normal bile ducts; 12 of choledocholithiasis, and 15 of BDca. The depth of invasion of the BDca was diagnosed with a 93% accuracy rate by visualizing the EP or MA or both. The infiltration of BDca into the surrounding organs was clearly visualized and diagnosed with an accuracy of 100% in the RHA, 93% in the PV, and 93% in the pancreas. These accuracy rates were higher than those obtained by computed tomography or angiography. We believe, therefore, that IDUS should be further studied as a diagnostic modality for staging malignancy in the biliary field.
authors.affiliation: Second Department of Internal Medicine, Nagoya University School of Medicine, Nagoya, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kuroiwa
authors.forename: Y
authors.initials: Y
authors.lastname: Tsukamoto
authors.forename: Y
authors.initials: Y
authors.lastname: Naitoh
authors.forename: Y
authors.initials: Y
authors.lastname: Hirooka
authors.forename: T
authors.initials: T
authors.lastname: Furukawa
authors.forename: T
authors.initials: T
authors.lastname: Katou
mesh_terms: D001650:Bile Duct Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D017734:Bile Ducts, Extrahepatic / Q000000981:diagnostic imaging*; D042882:Gallstones / Q000000981:diagnostic imaging; D006801:Humans; D009361:Neoplasm Invasiveness; D015203:Reproducibility of Results; D014463:Ultrasonography / Q000379:methods*