Endovascular Treatment for Patients With Isolated Internal Iliac Artery Aneurysm: A Single-Center Retrospective Study Over a 10-Year Period

Endovascular treatment, particularly the combination of stent-graft implantation and coil embolization, is both safe and effective for IIIAA, with a mid-term re-intervention-free survival rate of 85.25% and an acceptable risk of pelvic ischemia. Complete embolization of the outflow branches is technically challenging in some cases, and the efficacy of sac embolization as an alternative remains debatable.Clinical ImpactIsolated internal iliac artery aneurysm (IIIAA) is an exceedingly rare condition. This retrospective study identified and included 45 patients with IIIAA who were treated at our institution to evaluate the safety and therapeutic efficacy of endovascular treatment. The majority of patients underwent stent-graft implantation to seal the internal iliac artery ostium, along with coil embolization of the distal branches. The 2-year reintervention-free survival rate for all patients was 85.25%, demonstrating the favorable efficacy of endovascular treatment. However, postoperative sac dilation was observed in 4 patients who did not receive complete distal branch embolization, emphasizing the need for rigorous follow-up in this subset of patients.