title: An intraductal papillary neoplasm of the bile duct at the duodenal papilla.
abstract: In recent years, the disease concept of intraductal papillary neoplasm of the bile duct (IPNB) has been attracting attention as a biliary lesion that is morphologically similar to intraductal papillary mucinous neoplasm (IPMN), which is considered to be a counterpart of IPMN. However, there are few reports on IPNB, and a consensus regarding the features of this disease is thus lacking. We experienced an extremely rare case of IPNB occurring in the bile duct at the duodenal papilla, which is a tumor presentation that has not previously been reported. Herein, we report this interesting case and discuss the possible association between IPMN and IPNB.
authors.affiliation: Department of Gastroenterology, Tokai University School of Medicine, Isehara, Japan.
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Kawaguchi
authors.affiliation: Department of Gastroenterology, Tokai University School of Medicine, Isehara, Japan.
authors.forename: Yohei
authors.initials: Y
authors.lastname: Kawashima
authors.affiliation: Department of Gastroenterology, Tokai University School of Medicine, Isehara, Japan.
authors.forename: Atsuko
authors.initials: A
authors.lastname: Maruno
authors.affiliation: Department of Gastroenterology, Tokai University School of Medicine, Isehara, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Ito
authors.affiliation: Department of Gastroenterology, Tokai University School of Medicine, Isehara, Japan.
authors.forename: Masami
authors.initials: M
authors.lastname: Ogawa
authors.affiliation: Department of Surgery, Tokai University School of Medicine, Isehara, Japan.
authors.forename: Hideki
authors.initials: H
authors.lastname: Izumi
authors.affiliation: Department of Surgery, Tokai University School of Medicine, Isehara, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Furukawa
authors.affiliation: Department of Surgery, Tokai University School of Medicine, Isehara, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Yazawa
authors.affiliation: Department of Surgery, Tokai University School of Medicine, Isehara, Japan.
authors.forename: Toshio
authors.initials: T
authors.lastname: Nakagori
authors.affiliation: Department of Pathology, Tokai University School of Medicine, Isehara, Japan.
authors.forename: Kenichi
authors.initials: K
authors.lastname: Hirabayashi
authors.affiliation: Department of Gastroenterology, Tokai University School of Medicine, Isehara, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Mine
keywords: Duodenal papilla; Intraductal papillary mucinous neoplasm; Intraductal papillary neoplasm of the bile duct; Intraductal ultrasound; Peroral cholangioscopy