Presentation
For illustration purposes.
From the case:
Spinnaker sail
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Image from https://en.wikipedia.org/wiki/Spinnaker#/media/File:Bear_of_Britain_spinnaker.jpg under creative commons licensce.
Case Discussion
Spinnaker has been used in two radiological sign contexts.
1. In pneumomediastininum in the neonate on chest x-ray
2. In vocal cord paralysis on CT chest
Both assigned this name due to the shape of the pathology being like the shape of a spinnaker sail.