Intraductal papillary mucininous neoplasm of the bile ducts: multimodality assessment with pathologic correlation |
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Authors: | Email author" target="_blank">Kentaro?TakanamiEmail author Takayuki?Yamada Masashi?Tsuda Kei?Takase Kazuyuki?Ishida Yasuhiro?Nakamura Atsushi?Kanno Tooru?Shimosegawa Michiaki?Unno Shoki?Takahashi |
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Institution: | (1) Department of Diagnostic Radiology, Tohoku University Graduate School of Medicine, Seiryomachi, 1-1, Aoba-ku, Sendai 980-8574, Japan;(2) Department of Radiology, Sendai City Hospital, Wakabayashi-ku, Shimizukouji 3-1, Sendai, Japan;(3) Department of Pathology, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai, Japan;(4) Division of Gastroenterology, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai, Japan;(5) Division of Hepato-Biliary-Pancreatic Surgery, Department of Surgery, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai, Japan |
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Abstract: | Mucin-producing intraductal papillary neoplasm (adenocarcinoma/adenoma) in the bile duct is becoming recognized as a specific
type of neoplasm. Since, it bears a striking similarity to intraductal papillary mucinous neoplasms of the pancreas with regard
to its histopathologic features, the term “intraductal papillary mucinous neoplasms of the bile duct” (IPMN-B) is frequently
used, although no definite terminology or definition has been decided by World Health Organization. This neoplasm lacks ovarian-like
stroma and communicates with the bile ducts, unlike biliary mucinous cystic neoplasm (MCN). On the other hand, malignant IPMN-B
is categorized as an intraductal-growth type of intrahepatic cholangiocarcinoma (ICC). In comparison to other types of ICC,
such as the mass-forming type and periductal-infiltrating type that have poor resectability and an unfavorable prognosis,
malignant IPMN-B can be resected and demonstrates a more favorable prognosis. Meanwhile, unlike biliary MCN that is usually
confined in a closed cyst, IPMN-B can spread along the mucosal surface of the bile ducts, and it should be widely resected.
Therefore, multimodality assessment is needed to ensure the correct diagnosis of IPMN-B. We herein review the imaging findings
of IPMN-B with pathologic correlation. |
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