Vascular-enteric fistula: Diagnosis by colonoscopy

A Rare Cause of Gastrointestinal Bleeding: Aorto-Enteric Fistula

“…The criticality of the clinical status frequently mandates emergency intervention before confirmation; however various diagnostic methodologies exist, including CT angiography, endoscopy, or arteriography to detect the abnormal communication [10][11][12]. Rapid diagnosis is essential as there is a limited time window before exsanguination ensues.…”

Imaging work-up and endovascular treatment options for aorto-enteric fistula

“…While SAEFs are frequently diagnosed intraoperatively during laparotomy, and are occasionally detected pre-operatively with endoscopy, CT angiography is the diagnostic modality of choice (3,7,8,21,22). CT angiography has a relatively high sensitivity (approximately 94%) and specificity (approximately 85%) for the diagnosis of SAEF (23)(24)(25).…”

Aortic Paraprosthetic-colonic Fistulae: A Review of the Literature

“…Following development of signs and symptoms, SAEF diagnosis is typically delayed, by as long as 1 month in 50% of patients in one report, with the diagnosis being made within 10 days of hospitalization in only 15% of cases. 65 Diagnostic studies include plain radiography, 70 computed tomography scan (CT), 27,71,72 barium GI series, 6,13,51 endoscopy, 35 18-fluorodeoxyglucose positron emission tomography, 73 gallium 67 scanning 62,74 and angiography. 6,51 However, it is not unusual for these studies to be negative or equivocal and for the diagnosis to be established only at surgical exploration.…”

“…45 Malaki et al 76 visualized the limb of an aortobifemoral graft within the patient's cecum following an inflammatory AAA repair. Hamdani and Summers 35 diagnosed a PEF involving the limb of an aortobifemoral graft and the sigmoid in a patient 10 years after an open AAA repair.…”