"Aortic ductus diverticulum is due to the persistent patency of the aortic end of the foetal ductus arteriosus. Oxygen-induced constriction and remodelling begin at birth, and closure starts at the more sensitive pulmonary end. If obliteration is incomplete, a residual outpouching of the thoracic aorta may remain, which can be mistaken for an acute aortic injury, which typically occurs at the same location."
"descending aortic diverticulum - due to an incomplete double aortic arch"
Expected headings
"Gross anatomy"
"Types"
"It is usually seen at the anteromedial aspect of the aorta at the site of the aortic isthmus, where the ligamentum arteriosum attaches. It is also the site of the majority (~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 traumatic pseudoaneurysm is vitally important."