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. 2019 Jun 13;10:63. doi: 10.1186/s13244-019-0753-3

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 2 — Causes of obstruction. a Axial CT image showing complete obstruction of the SVC secondary to extrinsic mass compression (arrow). b Axial CT image demonstrating SVC narrowing/occlusion (arrow) secondary to chronic indwelling catheter. c Axial CT image demonstrating intraluminal obstruction of the left axillary vein from a chronic thrombus (arrow)