CTICasesGas Collection Associated with an Empty Azygos Fissure
Imaging findings
CT shows an empty azygos fissure (where the azygos vein has displaced out of the fissure) associated with a focal gas collection situated directly beneath the pleural fold. A small airway appears to be directed toward or running alongside this collection.
Key takeaways
An empty azygos fissure is a rare finding where the azygos vein has slipped out of its congenital fissure, leaving a double-layered pleural fold. The associated subpleural air collection represents a curiosity that could be trapped lung or a tiny bleb.
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