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Erschienen in: Journal of Hepato-Biliary-Pancreatic Sciences 2/2013

01.02.2013 | Original Article

Proposal for a morphological classification of intraductal papillary neoplasm of the bile duct (IPN-B)

verfasst von: Hiroyuki Kato, Masami Tabata, Yoshinori Azumi, Ichiro Osawa, Masashi Kishiwada, Takashi Hamada, Shugo Mizuno, Masanobu Usui, Hiroyuki Sakurai, Shuji Isaji

Erschienen in: Journal of Hepato-Biliary-Pancreatic Sciences | Ausgabe 2/2013

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Abstract

Purpose

We propose a morphological classification of intraductal papillary neoplasm of the bile duct (IPN-B).

Methods

A retrospective analysis of 16 patients with IPN-B who had undergone surgical resection was conducted. These 16 cases were classified into three types based on the primary lesion’s anatomical location: branch duct type (6 cases), main duct type (5 cases) and mixed type (5 cases). In this paper we have analyzed the characteristics of IPN-B according to our new classification.

Results

All branch duct type IPN-B was located in the left lobe and 5 of them were resected by left hepatectomy without extrahepatic bile duct resection (EBDR). On the other hand, all patients with main duct and mixed type IPN-B underwent EBDR in addition to hepatectomy or pancreatoduodenectomy. Microscopically, 2 of 6 patients with branch duct type IPN-B had no malignant component and, in the remaining 4 patients, cancer invasion was restricted to within the ductal wall. There were no cases of branch duct type IPN-B with lymph node metastasis and superficial intraductal tumor spread. In contrast, all patients with main duct and mixed duct type IPN-B had the malignant component. In all cases, lymph node metastasis was not observed, but superficial intraductal tumor spread was frequently found in extrahepatic bile duct lesions: 3 of main duct type and 3 of mixed type. Four patients with superficial intraductal spread had non-curative resection due to a cancer-positive ductal margin. Most patients with IPN-B obtained a good prognosis, but two patients with a cancer-positive ductal margin developed local recurrence.

Conclusions

Our classification vividly reflects clinical and pathological characteristics of IPN-B and is useful to determine appropriate surgical strategy.
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Metadaten
Titel
Proposal for a morphological classification of intraductal papillary neoplasm of the bile duct (IPN-B)
verfasst von
Hiroyuki Kato
Masami Tabata
Yoshinori Azumi
Ichiro Osawa
Masashi Kishiwada
Takashi Hamada
Shugo Mizuno
Masanobu Usui
Hiroyuki Sakurai
Shuji Isaji
Publikationsdatum
01.02.2013
Verlag
Springer Japan
Erschienen in
Journal of Hepato-Biliary-Pancreatic Sciences / Ausgabe 2/2013
Print ISSN: 1868-6974
Elektronische ISSN: 1868-6982
DOI
https://doi.org/10.1007/s00534-012-0513-y

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