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We evaluated safety and long-term outcome of endovascular therapy for steno-occlusive iliac artery disease. All endovascular procedures of iliac artery lesions performed at our institution between 2001 and 2014 (n = 676) were retrospectively analyzed. The overall technical success rate was 99% and yielded 100% for stenoses (n = 596) and 95% for chronic total occlusions (n = 80). Lesion complexity defined by the Trans-Atlantic Inter-Society Consensus (TASC) II classification had no impact on success rates (TASC A + B vs C + D; 99.5% vs 98.6%, P = .359). During a median follow-up of 11 months, the overall rate of restenosis was 9.4%. After 1 and 3 years, the primary patency rates were 94% and 86% and the secondary patency rate was 100%, respectively. The TASC II classification had no impact on long-term patency rates (TASC A + B vs C + D; 86% vs 81%). In a multivariable analysis, stent diameter remained the only significant predictor for restenosis (hazard ratio: 0.58; 95% confidence interval: 0.41%-0.81%; P = .002). In this single-center retrospective study, endovascular therapy for steno-occlusive iliac artery disease was associated with high technical and clinical success rates as well as an excellent long-term patency rate irrespective of lesion complexity.