Characteristics of atherosclerotic isolated iliac artery aneurysms (IAAs) and various strategies for their treatment were assessed retrospectively. The computerized medical records of 18 patients who underwent surgical or endovascular treatment of an IAA during the 10 years from April 1993 to March 2003 at our university hospital were reviewed to obtain information on patient demographics, risk factors, type of IAA treatment, and outcome. Additional data were obtained by mail and telephone. Patients with an IAA were compared with 168 patients treated for an abdominal aortic aneurysm (AAA) also at our institution. Early in the series of isolated IAA repairs, patients underwent prosthetic graft interposition (n = 7) or thromboexclusion (n = 4). Subsequently, patients had either endovascular thromboembolization (n = 4) or endovascular thromboembolization with femorofemoral crossover bypass (n = 3). No perioperative deaths occurred in the series. Deep venous thrombosis developed postoperatively in one patient; there were no other serious complications. The cumulative patency rate for the implanted interposition grafts during the mean observation time of 5.5 years was 100%. No endoleakage was observed after the endovascular procedures. In the long-term, five patients died of causes unrelated to the IAA treatment. A statistical analysis revealed no significant differences between the IAA group and the AAA group with respect to atherosclerotic risk factors. In conclusion, open surgical procedures to repair isolated IAAs generally have a good outcome, although the risk of injury to adjacent iliac veins remains. Endovascular treatments appear to have some advantages, but studies including long-term follow-up are needed to assess the efficacy and durability of prosthetic grafts used for these procedures.
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