CTICasesEmpty Azygos Fissure Post-Pneumothorax
Imaging findings
CT chest shows the azygos vein has escaped from the azygos fissure and is now located against the mediastinum, leaving the fissure empty. This occurred after a pneumothorax and lung collapse.
Key takeaways
A pneumothorax can cause collapse of the azygos lobe, allowing the azygos vein to slip out of the fissure and become positioned against the mediastinum. Upon lung re-expansion, the fissure remains empty.
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