title: Aorto-venous fistula between an abdominal aortic aneurysm and an aberrant renal vein: a case report.
abstract: BACKGROUND
  The potential complications of an abdominal aortic aneurysm include rupture, compression of surrounding structures, thrombo-embolic events and fistula. The most common site of arterio-venous fistula is the inferior vena cava. Fistula involving a renal vein is particularly uncommon.
  
  
  METHODS
  This report describes a 54-year-old Caucasian woman who was admitted to the emergency department with fatigue, severe dyspnea and bilateral lower limb edema. In the first instance this anamnesis suggested possible heart failure. In fact, our patient presented with multi-organ system failure due to a fistula between an infra-renal aortic aneurysm and an aberrant retro-aortic renal vein.
  
  
  CONCLUSIONS
  To our knowledge, this is the first report of a woman with a fistula between an infra-renal aortic aneurysm and an aberrant retro-aortic left renal vein. Aorto-venous fistulas may be asymptomatic or may present with symptoms characteristic of arterio-venous shunting and/or aneurysm rupture. This type of fistula is a rare cause of heart failure. Clinical examination and imaging are essential for detection.
authors.affiliation: Department of Internal Medicine, Cantonal Hospital, Fribourg, 1700, Switzerland. melanie.faucherre@gmail.com.
authors.forename: Mélanie
authors.initials: M
authors.lastname: Faucherre
authors.forename: Nader
authors.initials: N
authors.lastname: Haftgoli-Bakhtiari
authors.forename: Markus
authors.initials: M
authors.lastname: Menth
authors.forename: Julien
authors.initials: J
authors.lastname: Gaude
authors.forename: Beat
authors.initials: B
authors.lastname: Lehmann