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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. 8 — Brachiocephalic blockage. a Schematic image of a brachiocephalic obstruction and pathway for collateral flow. b Axial CT image of a 59-year-old female with a mediastinal tumor demonstrating extrinsic compression of the left brachiocephalic vein (black arrow) before it enters the SVC (white arrow). c Axial CT image in the same patient showing a dilated azygos vein (gray arrow) draining into the SVC (white arrow). d Axial CT image in a different patient demonstrates a prominent right internal thoracic vein (dashed arrow) draining into the SVC (white arrow) bypassing a right-sided brachiocephalic blockage (not pictured)