Citation, DOI & case data
Underlying diabetes mellitus and hypertension. Presented with generalized abdominal pain for the past 4 days, more in the epigastric region. Patient also complained of pulsatile sensation over the epigastric region.
Loading Stack -
0 images remaining
Fusiform aneurysmal dilatation of the infrarenal abdominal aorta measures 5.4 cm (AP) x 5.6 cm (W) x 6.7 cm (CC). It is about 5.9 cm inferior to the right main renal artery. It extends inferiorly until before the bifurcation. Presence of thick intramural hematoma at the superior half of the aneurysm measures 3.1 cm in maximum thickness.
There is poor plane of demarcation with the small bowel (at dudeno-jejunal junction) with presence of air-pocket in the superior part of the aneurysm suggestive of aorto-enteric fistula.
Presence of extensive periaortic strandings with adjacent loculated collection suggestive of chronic contained leak.
No contrast extravasation to suggest active leak.
Prompt diagnosis of aortoenteric fistulas is imperative for patient survival. The clinical signs of aortoenteric fistula include hematemesis, melena, sepsis, and abdominal pain, but the condition also may be clinically occult. Because clinical signs may not be present or may not be sufficiently specific, imaging is most often necessary to achieve an accurate diagnosis.
Aortic fistulas can be primary (associated with complicated abdominal aortic aneurysm) or secondary (associated with graft repair). A primary aortoenteric fistula forms when a large abdominal aortic aneurysm closely abuts bowel loops, usually the 3rd or 4th parts of the duodenum. Due to long-standing pressure, the aneurysm slowly erodes into the bowel wall. These are most commonly due to infected mycotic aneurysms.
Secondary aortoenteric fistulas are seen as a complication of aortic reconstructive surgery with or without the placement of an aortic stent-graft. Secondary fistulas that result from perigraft infection may occur between 2 weeks and 10 years after surgery.
In this case, the patient had generalized abdominal pain with the incidental finding of a pulsatile abdominal mass.
A diagnosis of primary aortoenteric fistula has been made based on the CT findings.
- 1. Quan D. M. Vu, Christine O. Menias, Sanjeev Bhalla, Christine Peterson, Lisa Lihaun Wang, Dennis M. Balfe. Aortoenteric Fistulas: CT Features and Potential Mimics. RadioGraphics 2009; 29:197–209.
1 article features images from this case
22 public playlists include this case
- Gi by Muna Almull
- Vascular by Allister Howie
- * 2019-20 EM surgical by Derek Smith ◉
- Viva - Vascular 2 by Hao Xiang
- nezar GIT by nezar shlaka
- General -2 by Asmita Chugh
- Abdo by Davina Bates
- Abdomen 101 by Sarthak J Gohel
- GI quiz visto by Antonio Jesús
- Vascular cases by Antonio Castellaccio
- Intern Radiology - CT abdomen by Craig Hacking ◉ ◈
- Abdomen 17/6/2020 by Davina Bates
- Cardiovascular by Saurabh Srivastava
- Vascular by Matt Page
- Abdomen by Laura
- Prüfung by Dr. Kaan Kitapci
- FRCR Cardiac by Mohamed Talaat Abdallatif
- Chest 1 by Rajkumar Yalawar ◉
- BM - GI by Blake Milton
- Vascular & Intervention by Matt Page
- urgente by Popovici Alexandra
- 2022 ICU online quiz by Craig Hacking ◉ ◈