title: A case of intraductal papillary neoplasm of the bile duct preoperatively diagnosed using contrast-enhanced endoscopic ultrasonography.
abstract: A 71-year-old man was referred to our hospital and was diagnosed with jaundice and a liver function disorder. Although we suspected an intraductal papillary neoplasm of the bile duct (IPNB)-derived caudate branches on the basis of contrast-enhanced CT, MRI, and endoscopic retrograde cholangiopancreatography, we could not clearly identify the tumor. Therefore, we examined the lesion using endoscopic ultrasonography (EUS). We could visualize an iso-hyperechoic elevated tumor in the caudate branches. The tumor was observed as a hypervascular lesion using contrast-enhanced EUS, which is useful in preoperatively diagnosing IPNB and detecting the presence of lesions.
authors.affiliation: Department of Gastroenterology, Saitama Medical University International Medical Center.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Tanisaka
authors.forename: Hirotoshi
authors.initials: H
authors.lastname: Iwano
authors.forename: Kumiko
authors.initials: K
authors.lastname: Taba
authors.forename: Hiroko
authors.initials: H
authors.lastname: Sato
authors.forename: Maiko
authors.initials: M
authors.lastname: Harada
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Katsukura
authors.forename: Kimiyasu
authors.initials: K
authors.lastname: Aikawa
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Miyazawa
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yamaguchi
authors.forename: Shomei
authors.initials: S
authors.lastname: Ryozawa
mesh_terms: D000368:Aged; D001650:Bile Duct Neoplasms / Q000000981:diagnostic imaging*; D001653:Bile Ducts, Intrahepatic / Q000000981:diagnostic imaging*; D002291:Carcinoma, Papillary / Q000000981:diagnostic imaging*; D003287:Contrast Media; D020776:Endoscopes, Gastrointestinal; D006801:Humans; D008297:Male; D014463:Ultrasonography
chemical_list: D003287:Contrast Media