CTICasesAortic Coarctation
Imaging findings
Severe narrowing of the aorta at the takeoff of the left subclavian, accompanied by atresia of the aortic arch and prominent chest wall collaterals.
Key takeaways
In adults, coarctation often presents with atresia of the arch rather than a classic "3-sign." The presence of rib notching is caused by retrograde flow through dilated intercostal arteries.
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