Abstract
ObjectiveIsolated internal iliac artery aneurysms (IIIAAs) are rare, life-threatening entities for which the optimal treatment strategy has not been established. This study aimed to evaluate the outcomes of open and endovascular treatment of IIIAAs. MethodsIIIAA cases between January 2009 and March 2019 at two hospitals were retrospectively reviewed. Demographic, clinical, ancillary testing, treatment, and outcome data were collected and analyzed. ResultsForty-two patients (37 men and 5 women) with a mean age of 71 years were included. Twenty-five patients (60%) had a history of hypertension. Twenty-two patients (52%) were asymptomatic, and 16 (38%) presented with abdominal pain (12 with ruptured aneurysms). The 42 included patients had 43 treated IIIAAs. The following surgical techniques were used: surgical resection (n = 6), endovascular coil embolization (n = 12), endovascular stent graft placement across the internal iliac artery origin (n = 8 with 9 aneurysms), and combined coil embolization and stent graft placement (n = 16). The immediate technical success rate was 67%, 67%, and 88% for embolization, stent graft placement, and combined method, respectively. Open surgery was associated with the longest operative time and hospital stay. Overall 30-day mortality was 5% for all patients and 17% for patients with ruptured IIIAAs. Buttock claudication occurred in 7 of 40 patients who survived (18%). The median follow-up time was 56 months. The combined approach was associated with the lowest rates of endoleak (6% vs 25% and 29%) and reintervention (6% vs 17% and 29%) of the three endovascular methods. ConclusionsEndovascular coil embolization with stent graft placement is a feasible, safe, and effective treatment approach for large IIIAAs without adequate aneurysm necks.
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