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. 2014 Apr 22;14(1):14. doi: 10.1186/1470-7330-14-14

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Copyright © 2014 Hennedige et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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CT and MRI appearances of mass forming type of iCCA. Top row: non contrast enhanced (a), post contrast enhanced arterial phase (b), portal venous phase (c) and delayed phase (d) CT images. Bottom row: post contrast enhanced MRI images in arterial phase (e), portal venous phase (f), delayed phase (g), and 20-minute delay post Gd-EOB-DTPA image (h). The mass is iso- to hypodense to liver and shows similar contrast enhancement characteristics on both CT and MRI with peripheral rim like arterial phase enhancement with centripetal enhancement in the portal venous and delayed phases without any washout. In the hepatobiliary phase there is no uptake of Gd-EOB-DTPA by the mass suggesting a non-hepatocellular tumor.