Iliac Artery-Uretero-Colonic Fistula Presenting as Severe Gastrointestinal Hemorrhage and Hematuria: A Case Report and Review of the Literature.

Arterioenteric fistulas represent an infrequent but potentially fatal cause of gastrointestinal hemorrhage. Patients often present in extremis from shock and sepsis. This mandates a rapid diagnosis so that prompt, potentially life-saving interventions can be performed. We report the case of a 35-year-old man who presented with hematuria and hematochezia secondary to an iliac artery-uretero-colonic fistula that developed years after open common iliac artery aneurysm repair. His condition rapidly progressed to hemorrhagic shock, and he underwent successful endovascular treatment with a covered stent graft as a bridge to definitive open surgery. Subsequently, graft explantation, extra-anatomic arterial bypass, bowel resection, and ureter ligation was undertaken. A summary of the literature on iliac artery-enteric fistulas follows.