PMC7596335_01
Chest X-ray PA film showing subcutaneous emphysema (orange arrow) and a continuous diaphragm sign (blue arrow). (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
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A chest radiograph (CXR) showed evidence of subcutaneous emphysema over the neck base and was suspicious for air outlining the bronchial walls along with a continuous diaphragm sign (Fig. 1).
CT scan of the chest showing pneumopericardium (green arrow). (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
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A non-contrast CT scan of the chest revealed air in the pericardial sac, around aortic branches, and bronchial walls consistent with pneumomediastinum and pneumopericardium (Fig. 2, Fig. 3).