title: Biliary papillary tumors share pathological features with intraductal papillary mucinous neoplasm of the pancreas.
abstract: Recently, attention has been drawn to papillary neoplasm of the pancreatobiliary systems. In the pancreas, the disease entity of intraductal papillary mucinous neoplasm (IPMN-P) is widely recognized. In contrast, the pathological characteristics of biliary papillary tumors, such as biliary papilloma(tosis) and papillary cholangiocarcinoma, have not yet been well documented. In this study, we compared the pathological features and post-operative prognosis among biliary papillary tumors (10 cases of biliary papilloma(tosis) and 22 cases of papillary cholangiocarcinoma), conventional non-papillary cholangiocarcinoma (15 cases), and IPMN-P (31 cases). Macroscopically, all biliary papillary tumors were characterized by the prominent intraductal papillary proliferation, and macroscopic mucin-hypersecretion was seen in 9 of 32 cases (28%). Histologically, biliary papillary tumors consisted of three types of tumor cells (pancreaticobiliary, intestinal and gastric types), whereas only the pancreaticobiliary type was observed in non-papillary cholangiocarcinoma. Immunohistochemically, biliary papillary tumors were characterized by the common expression of MUC2, CDX2 and cytokeratin 20. In addition, biliary papillary tumors could be associated with two types of invasive lesions: tubular adenocarcinoma (9 cases) and mucinous carcinoma (5 cases). Patients with tubular adenocarcinoma had a poor prognosis compared to non-invasive papillary tumor or papillary tumor with mucinous carcinoma. These pathological characteristics and the survival status of biliary papillary tumors were different from those of non-papillary cholangiocarcinoma, and rather closely resembled those of IPMN-P. In conclusion, biliary papillary tumors may be the biliary counterpart (intraductal papillary neoplasm of the bile duct) of IPMN-P.
authors.affiliation: Department of Human Pathology, Kanazawa University Graduate School of Medicine, Kanazawa, Japan.
authors.forename: Yoh
authors.initials: Y
authors.lastname: Zen
authors.forename: Takahiko
authors.initials: T
authors.lastname: Fujii
authors.forename: Keita
authors.initials: K
authors.lastname: Itatsu
authors.forename: Koichi
authors.initials: K
authors.lastname: Nakamura
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Minato
authors.forename: Satomi
authors.initials: S
authors.lastname: Kasashima
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kurumaya
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Katayanagi
authors.forename: Atsuhiro
authors.initials: A
authors.lastname: Kawashima
authors.forename: Shinji
authors.initials: S
authors.lastname: Masuda
authors.forename: Hideki
authors.initials: H
authors.lastname: Niwa
authors.forename: Takeshi
authors.initials: T
authors.lastname: Mitsui
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Asada
authors.forename: Shouji
authors.initials: S
authors.lastname: Miura
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Ohta
authors.forename: Yasuni
authors.initials: Y
authors.lastname: Nakanuma
mesh_terms: D000230:Adenocarcinoma / Q000378:metabolism / Q000401:mortality / Q000473:pathology*; D000368:Aged; D000369:Aged, 80 and over; D001650:Bile Duct Neoplasms / Q000378:metabolism / Q000401:mortality / Q000473:pathology*; D014408:Biomarkers, Tumor / Q000378:metabolism; D000071616:CDX2 Transcription Factor; D018281:Cholangiocarcinoma / Q000401:mortality / Q000473:pathology / Q000601:surgery; D005260:Female; D018398:Homeodomain Proteins / Q000378:metabolism; D006801:Humans; D053554:Keratin-20 / Q000378:metabolism; D053552:Keratin-7 / Q000378:metabolism; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D055271:Mucin 5AC; D055262:Mucin-2; D009077:Mucins / Q000378:metabolism; D010190:Pancreatic Neoplasms / Q000378:metabolism / Q000401:mortality / Q000473:pathology*; D010212:Papilloma / Q000378:metabolism / Q000401:mortality / Q000473:pathology*; D011379:Prognosis; D015996:Survival Rate
chemical_list: D014408:Biomarkers, Tumor; D000071616:CDX2 Transcription Factor; C491270:CDX2 protein, human; D018398:Homeodomain Proteins; D053554:Keratin-20; D053552:Keratin-7; C524625:MUC2 protein, human; C524678:MUC5AC protein, human; D055271:Mucin 5AC; D055262:Mucin-2; D009077:Mucins