Secondary Aortoenteric Fistula Possibly Associated with Continuous Physical Stimulation: a Case Report and Review of the Literature

Overview

Journal J Med Case Rep

Publisher Biomed Central

Specialty General Medicine

Date 2019 Mar 16

PMID 30871625

Citations 5

Authors

Hiroaki Saito

Yoshitaka Nishikawa

Jun-Ichi Akahira

Hajime Yamaoka

Toru Okuzono

Toyoaki Sawano

Masaharu Tsubokura

Kazuhiro Yamaya

Affiliations

Soon will be listed here.

Abstract

Background: Secondary aortoenteric fistula is a rare but fatal complication after reconstructive surgery for an aortic aneurysm characterized by abdominal pain, fever, hematochezia, and hematemesis, and the mortality rate is high. It has been suggested that it arises due to either continuous physical stimulation or prosthesis infection during primary surgery. We describe an aortoenteric fistula following reconstructive surgery for an abdominal aortic aneurysm together with postmortem pathological findings.

Case Presentation: A 59-year-old Japanese man who had undergone reconstructive surgery for an abdominal aortic aneurysm 20 months earlier presented with the chief complaint of hematochezia and malaise. Esophagogastroduodenoscopy and total colonoscopy revealed only colon diverticula with no bleeding. Contrast-enhanced computed tomography revealed gas within the aneurysm sac and adhesion between the replaced aortic graft and intestinal tract, suggesting a graft infection. After 18 days of antibiotic treatment, he suddenly went into a state of shock, with massive fresh bloody stool and hematemesis, followed by cardiac arrest. An autopsy revealed communication between the artery and the ileum through an ulcerative fistula at the suture line between the left aortic graft branch and the left common iliac artery. Pathological analysis revealed tight adherence between the arterial and intestinal walls, but no marked sign of infection around the fistula, suggesting that the fistula had arisen due to physical stimuli.

Conclusions: Pathological analysis suggested that the present secondary aortoenteric fistula arose due to physical stimuli. This reaffirms the importance of keeping reconstructed aortas isolated from the intestine after abdominal aortic aneurysm surgery.

Citing Articles

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The usefulness of gel immersion endoscopy in identifying herald bleeding from an infectious aortoenteric fistula: a case report.

Suzuki S, Saito M, Uno K, Asano N, Koike T, Akamatsu D Clin J Gastroenterol. 2024; 17(5):871-875.

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