title: Intraductal papillary neoplasm originating from an anomalous bile duct.
abstract: An 82-year-old woman who had been suffering from repeated obstructive jaundice for 7 years was referred to our hospital. Although endoscopic aspiration of the mucin in the common bile duct had been temporally effective, origin of the mucin production had not been detectable. The patient thus had been forced to be on long-term follow-up without curative resection. Endoscopic retrograde cholangioscopy on admission revealed massive mucin in the common bile duct. In addition, an anomalous bile duct located proximal to the gallbladder was identified. Since the lumen of the anomalous duct was irregular and the rest of biliary tree was completely free of suspicious lesions, the anomalous duct was judged to be the primary site. Surgical resection of the segment 4 and 5 of the liver combined with the extrahepatic biliary tract was performed. Pathological diagnosis was compatible to intraductal papillary neoplasm with high-grade intraepithelial dysplasia of the anomalous bile duct. The patient has been free from the disease for 6.5 years after resection. This is the first case of intraductal papillary neoplasm derived from an anomalous bile duct, which was resected after long-term conservative treatment. The present case suggested the slow growing character of natural history of the neoplasm.
authors.affiliation: Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
authors.forename: Harufumi
authors.initials: H
authors.lastname: Maki
authors.affiliation: Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
authors.forename: Taku
authors.initials: T
authors.lastname: Aoki
authors.affiliation: Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
authors.forename: Takeaki
authors.initials: T
authors.lastname: Ishizawa
authors.affiliation: Department of Pathology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
authors.forename: Mariko
authors.initials: M
authors.lastname: Tanaka
authors.affiliation: Department of Pathology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Sakatani
authors.affiliation: Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
authors.forename: Yoshifumi
authors.initials: Y
authors.lastname: Beck
authors.affiliation: Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Hasegawa
authors.affiliation: Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Sakamoto
authors.affiliation: Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan. KOKUDO-2SU@h.u-tokyo.ac.jp.
authors.forename: Norihiro
authors.initials: N
authors.lastname: Kokudo
mesh_terms: D000369:Aged, 80 and over; D001650:Bile Duct Neoplasms / Q000000981:diagnostic imaging / Q000601:surgery*; D001653:Bile Ducts, Intrahepatic / Q000002:abnormalities*; D021441:Carcinoma, Pancreatic Ductal / Q000000981:diagnostic imaging / Q000601:surgery*; D002291:Carcinoma, Papillary / Q000000981:diagnostic imaging / Q000601:surgery*; D002760:Cholangiopancreatography, Endoscopic Retrograde; D018450:Disease Progression; D005260:Female; D006801:Humans; D014057:Tomography, X-Ray Computed
keywords: Aberrant; Anomalous; Intraductal papillary neoplasm of the bile duct