Spontaneous ilio-iliac arteriovenous fistula due to an iliac artery aneurysm: a case-report.

A spontaneous arterio-venous ilioiliac fistula (AVF) caused by an iliac artery aneurysm (IAA) is a rare complication. We present the case of a 75-year-old man with previous aortic surgery 11 years before who was admitted at the Emergency Department for acute gluteal pain. He was suspected for a hip problem because of cup loosening on X-ray. A lumbar CT-scan to rule out nerve compression showed an aneurysm of the left common and internal iliac artery that was ruptured into the iliac vein. The AVF was treated endovascularly under local anesthesia by a sandwich technique (covered stent at the venous side and coils at the arterial side) with good results. The case demonstrates that lifelong follow-up of a patient with previous aortic surgery is mandatory.