Abdominal Imaging

, Volume 38, Issue 2, pp 367–375 | Cite as

Aortoenteric fistulas: spectrum of CT findings

  • Siva P. Raman
  • Aya Kamaya
  • Michael Federle
  • Elliot K. Fishman
Article

Abstract

Objective

This article reviews the causes of aortoenteric fistulas, diagnostic options, and important CT findings.

Conclusion

Aortoenteric fistula, a rare but potentially fatal entity, presents a significant challenge to radiologists in diagnosis, largely because of its subtle and nonspecific imaging findings. These fistulas can be divided into primary and secondary forms, depending on the presence or absence of prior aortic reconstructive surgery, but the secondary form is more common. Typical CT findings, which can overlap with those seen in perigraft infection, aortitis, infected/mycotic aneurysms, perianeurysmal fibrosis, and the immediate post-operative period after placement of a graft, include: Effacement of the fat planes around the aorta, perigraft fluid/soft tissue thickening, ectopic gas, tethering of adjacent thickened bowel loops towards the aortic graft, and in rare cases, extravasation of contrast from the aorta into the involved segment of bowel.

Keywords

Computed tomography Aortoenteric fistula Perigraft infection Aortitis 

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • Siva P. Raman
    • 1
  • Aya Kamaya
    • 2
  • Michael Federle
    • 2
  • Elliot K. Fishman
    • 1
  1. 1.Department of RadiologyJohns Hopkins UniversityBaltimoreUSA
  2. 2.Stanford UniversityStanfordUSA

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