Related Experiment Video
Updated: Mar 6, 2026

Robot-assisted Partial Splenectomy
Published on: January 2, 2026
A Rare Cause of Primary Aortoenteric Fistula: Streptococcus parasanguinis Aortitis
Fredy Nehme1, Kyle Rowe1, Cyrus Munguti1
1Department of Internal Medicine, Kansas University School of Medicine, Wichita, KS, USA.
Abstract:
Primary aortoenteric fistula is a rare cause of upper gastrointestinal bleed but can lead to significant mortality if the diagnosis is delayed. Aortitis, characterized by inflammation of the aortic wall, is a rare cause of aortoenteric fistula. We present a case report of a 72-year-old male patient with infectious aortoenteric fistula secondary to Streptococcus parasanguinis, along with a review of the literature. This case demonstrates the importance of early diagnosis and aggressive surgical treatment of aortoenteric fistulae and recognizing infectious aortitis as a potential etiology.
Insights
Primary aortoenteric fistula, a rare cause of gastrointestinal bleeding, can be fatal if diagnosis is delayed. This case highlights infectious aortitis as a cause and the need for early surgical intervention.
Area of Science:
- Cardiovascular Surgery
- Infectious Diseases
- Gastroenterology
Background:
- Primary aortoenteric fistula is a rare but life-threatening condition causing upper gastrointestinal bleeding.
- Aortitis, or aortic wall inflammation, is an uncommon etiology for aortoenteric fistulae.
Observation:
- A 72-year-old male presented with an infectious aortoenteric fistula.
- The fistula was secondary to infection by *Streptococcus parasanguinis*.
Findings:
- This case underscores the critical need for prompt diagnosis of aortoenteric fistulae.
- Aggressive surgical management is essential for favorable outcomes.
Implications:
- Infectious aortitis should be considered in the differential diagnosis of aortoenteric fistulae.
- Early recognition and treatment of aortoenteric fistulae can significantly reduce mortality.
Related Concept Videos
Rheumatic Heart Disease I: Introduction
Endocarditis I: Introduction
Endocarditis II: Clinical Features of Infective Endocarditis
Bacterial Phylum Spirochaetes
Aneurysm I: Introduction
Aortic Regurgitation I: Introduction

