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. 2015 Feb 28;13:86. doi: 10.1186/s12957-015-0493-x

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© Xu et al.; licensee BioMed Central. 2015

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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Different classifications of PVTT. (A), (B), and (C) belong to group A; (D) and (E) belong to group B. (A) Tumor thrombi involving the main portal vein trunk, the left portal vein and the right portal vein; (B) tumor thrombi involving the main portal vein trunk; (C) tumor thrombi involving both the left and right portal veins; (D) tumor thrombi involving only the right branch of portal vein; and (E) tumor thrombi involving only the left branch of portal vein. PV, portal vein; PVTT, portal vein tumor thrombus.