How prevalent is a finding of focal outpouching on CT scan for abdominal aortic aneurysm (AAA)?

Updated: Jan 08, 2019
  • Author: Saum A Rahimi, MD, FACS; Chief Editor: Vincent Lopez Rowe, MD  more...
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In 10-20% of AAA cases, CT scans show focal outpouchings or blebs that are thought to contribute to the potential for rupture. The wall of the aneurysm becomes laminated with thrombus as the blebs enlarge. This process can yield the appearance of a relatively normal intraluminal diameter in spite of a large extraluminal size.

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