CTICasesInnominate artery stenosis
Imaging findings
Lateral chest radiograph shows coarse calcification in the superior mediastinum at the expected origins of the arch vessels. Arch CT angiogram confirms a bovine aortic arch origin with severe luminal stenosis of the innominate artery due to a large, dense calcified plaque at its origin.
Key takeaways
Bovine aortic arch is the most common anatomical variant of the arch, where the innominate and left common carotid arteries share a common origin. Atheromatous calcification at this common origin can cause stenosis and cerebral/extremity ischemia.
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