Insights on Aortoenteric Fistulas from a Tertiary Referral Center: Diagnostic Algorithm, Management and Outcomes.

Background

Aortoenteric fistulas (AEFs) are uncommon emergency surgical conditions associated with high mortality. We explored the presentation and management of AEFs in a tertiary hospital in Qatar, a rapidly developing Middle Eastern country. By highlighting our institutional experience with ADFs and AOFs, we aim to contribute to the growing body of literature on this rare condition and to emphasize the importance of early diagnosis, appropriate surgical planning, and multidisciplinary care in optimizing patient outcomes. We also proposed a diagnostic classification of AEFs to better understand their location, relationship to the aorta, and pathology on both sides (the gastrointestinal tract and Aorta) for further studies.

Methods

This was an observational, descriptive, retrospective, single-center case series that included 10 consecutive cases presenting with AEFs. We reviewed the clinical presentation, surgical management, and outcomes of AEF cases from 2008 to 2024. Data were extracted from electronic medical records and operative notes. Additionally, we reviewed the literature over the last two decades to summarize recently published English-language literature on aortoenteric fistulas (types, presentations, management and outcomes).

Results

This observational case series included nine males and one female; four with aortoesophageal (AOF) and six with aortoduodenal (ADF) fistulas. The main presentations were hypotension and upper gastrointestinal bleeding. Blood cultures were positive in four cases, including Escherichia coli, Candida albicans, and Klebsiella. Foreign bodies were the underlying cause in two cases, while an old aortic coarctation repair was found in one case. Surgical repair was not completed in two patients who deteriorated quickly and died with hypovolemic shock. Two patients had thoracic endovascular aortic repair, and others had open surgeries. The overall AEF-related mortality was 60% (n = 6; open surgery group).

Conclusions

This case series could support the importance of prompt diagnosis and multidisciplinary management. It also underscores the importance of individualized treatment to optimize survival. The proposed diagnostic algorithm still requires further evaluation and validation within large samples before its implementation on a large scale.