Pure autonomic failure
Apr. 24, 2023
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CT angiography of the head and neck shows a small right apical pneumothorax (solid arrow) and pneumomediastinum (nonsolid arrows). (Source: Morales G, Fiero M, Albert J, Di Gennaro J, Gerbino A. Cerebral arterial gas embolism due to helium inhalation from a high-pressure gas cylinder. Case Rep Emerg Med 2022;2022. Creative Commons Attribution 4.0 International License [CC BY 4.0].)