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. 2019 Dec 4;10:115. doi: 10.1186/s13244-019-0802-y

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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. 17 — a Variable hemiazygos drainage schematic. Independent drainage of the hemiazygos vein to the SVC, via the accessory hemiazygos vein→left superior intercostal vein→left brachiocephphalic vein path. b Variable hemiazygos drainage imaging. Contrast-enhanced CT scan showing independent drainage of the hemiazygos vein (triangle) to the left brachiocephphalic vein, via the left superior intercostal vein (arrow), with normal drainage of the azygos vein via the azygos arch (asterisk)