Angiographic evaluation of the ductus diverticulum.
The aortic isthmus in adults has a variable appearance on thoracic aortograms. Its configuration may show a concavity, a straightening or slight convexity, or a discrete focal bulge. The latter finding represents a ductus diverticulum and, in review of 103 aortograms, was found present in 9% of patients. At times a prominent ductus diverticulum may resemble, and be mistaken for, a traumatic pseudoaneurysm of the aortic isthmus. A traumatic pseudoaneurysm may be distinguished from a ductus diverticulum on aortography by demonstration of an intimal flap and/or delayed clearance of contrast material on subtracted films. However, a ductus diverticulum will exhibit neither of these features.
Goodman, PC; Jeffrey, RB; Minagi, H; Federle, MP; Thomas, AN
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