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. 2020 Mar 12;11:35. doi: 10.1186/s13244-020-0838-z

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© The Author(s). 2020

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. 16 — Pneumomediastinum in a 50-year-old man. The pneumomediastinum was caused by tracheostomy displacement. a A supine radiograph shows pneumomediastinum and subcutaneous emphysema. Air along the left aortic border and the medial left hemidiaphragm become V-shaped (i.e., “Naclerio’s V” sign) (arrows). The “continuous diaphragm” sign (arrowheads) is also visible. b A coronal CT image of the lung base reveals “Naclerio’s V” sign (arrows). c Another coronal CT image of the lung base reveals a “continuous diaphragm” sign (arrowheads)