Ductus diverticulum
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Aortic ductus diverticulum is a developmental outpouching of the thoracic aorta.
Gross anatomy
It is usually seen at the anteromedial aspect of the aorta at site of the previous ductus arteriosus, the aortic isthmus. This is also the site of 90% of posttraumatic aortic injuries as the ligamentum arteriosum is one of the points the thoracic aorta is tethered; therefore, differentiation of ductus arteriosus from a pseudoaneurysmis important.
In contrast to an aortic pseudoaneurysm, which usually forms sharp margins with the aorta, ductus diverticulum usually appears as a smooth focal bulge with gentle obtuse angles with the aortic wall.
Classification
Ductus diverticula are divided into:
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classic
- smooth gentle shoulders
- 33% newborns
- 9% adults
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atypical
- sharper with a shorter and steeper superior slope
Differential diagnosis
-</ul>- +</ul><h4>Differential diagnosis</h4><ul><li>
- +<a title="Aortic pseudoaneurysm" href="/articles/aortic-pseudoaneurysm">aortic pseudoaneurysm</a> - <a title="aortic arch pseudoaneurysm" href="/articles/aortic-arch-pseudoaneurysm">aortic arch pseudoaneurysm</a>
- +</li></ul>
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