CTICasesMid-Thoracic Aortic Coarctation
Imaging findings
CT angiography shows severe narrowing of the mid-descending thoracic aorta associated with a distal fusiform aneurysm. There is extensive collateralization via dilated internal mammary and superior/inferior epigastric arteries, in a patient with chronic large-vessel vasculitis.
Key takeaways
Atypical coarctation of the descending thoracic aorta can represent a congenital variant or the late sequel of large-vessel vasculitis (Takayasu). Collateralization via the internal mammary and epigastric pathways bypasses the stenosis, presenting with lower extremity claudication.
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