Ductus diverticulum

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 ligamentum arteriosum, at the aortic isthmus. This is also the site of 90% of post-traumatic aortic injuries as the ligamentum arteriosum is one of the points to which the thoracic aorta is tethered; therefore, differentiation of ductus diverticulum from a pseudoaneurysm is 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.


Ductus diverticula are divided into:

  • classic
    • smooth gentle shoulders
    • 33% newborns
    • 9% adults
  • atypical
    • sharper with a shorter and steeper superior slope

Differential diagnosis

Anatomy: Thoracic
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Article information

rID: 1239
System: Chest, Vascular
Section: Anatomy
Synonyms or Alternate Spellings:
  • Aortic ductus diverticulum
  • Ductus bump
  • Ductus diverticula
  • Ductus bumps

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