Abstract
Purpose
To assess the differences in early imaging features and progression pattern on CT between intrahepatic biliary metastasis (IBM) and non-mass-forming cholangiocarcinoma (NMFC) in patients with extrabiliary malignancy.
Methods
This retrospective study included 35 patients who were surgically and pathologically confirmed with IBM (n = 14) or NMFC (n = 21) at the time of or after surgery for extrabiliary malignancy. Two observers evaluated the following aspects of biliary lesions on initial or follow-up CT images: location, characteristics of intrahepatic duct (IHD) dilatation, presence of duct wall thickening, and periductal infiltration lesion or periductal expansile mass.
Results
All IBMs were associated with colorectal cancer (p = 0.032). As early imaging features on CT, smooth tapered localized IHD dilatation without duct wall thickening and peripheral duct involvement were observed significantly more often in IBM, and IHD dilatation with abrupt tapering or irregularity of transition site and bile duct wall thickening were significantly more common in NMFC (all p < 0.05). Regarding progression pattern, periductal expansile mass was present only in IBM, whereas periductal infiltrative lesion was present only in NMFC (p < 0.001).
Conclusion
In the differentiation between IBM and NMFC in patients with extrabiliary malignancy, the differences in early imaging features and progression pattern of the two diseases revealed in this study would be helpful for diagnosis.
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Abbreviations
- IBM:
-
Intrahepatic biliary metastasis
- NMFC:
-
Non-mass-forming cholangiocarcinoma
- IHD:
-
Intrahepatic duct
- CCC:
-
Cholangiocarcinoma
- CEA:
-
Carcinoembryonic antigen
- CA19-9:
-
Carbohydrate antigen 19-9
- TNM:
-
Tumor, node, metastases
- PACS:
-
Picture archiving and communication system
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Acknowledgements
We appreciate Prof. Cheol Keun Park and Prof. Kee Taek Jang for their histopathologic analysis.
Funding
We declare no sources of financial support or funding received from any organization including National Institutes of Health (NIH); Wellcome Trust; Howard Hughes Medical Institute (HHMI).
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The authors (Ji Hye Min, Kyung Mi Jang, Dong Ik Cha, Tae Wook Kang, Seong Hyun Kim, Seo-Youn Choi, and Kwangseon Min) declare no conflict of interest.
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Research involving human participants and/or animals: Research involving human participants. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
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This retrospective study was approved by our institutional review board, and the requirement for informed consent was waived.
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Min, J.H., Jang, K.M., Cha, D.I. et al. Differences in early imaging features and pattern of progression on CT between intrahepatic biliary metastasis of colorectal origin and intrahepatic non-mass-forming cholangiocarcinoma in patients with extrabiliary malignancy. Abdom Radiol 44, 1350–1360 (2019). https://doi.org/10.1007/s00261-018-1814-7
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DOI: https://doi.org/10.1007/s00261-018-1814-7