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The treatment of anterior communicating artery(AcomA)wide-necked aneurysms with the Enterprise stent(Cordis Miami Lakes,FL,USA)has not been well described,due to the complexity of vascular anatomy and small vessels of AcomA.To evaluate the feasibility,effectiveness and safety of Enterprise stent placement in AcomA aneurysms,we performed this retrospective study.Between November 2008 and December 2010,27 wide-necked AcomA ruptured aneurysms were treated within 72 hours after onset with the Enterprise stent.Data collected and analyzed were:demographic data,morphologic features of the aneurysms,treatment results and follow-up results.Twenty-nine Enterprise stents were successfully deployed in all 27 aneurysms,including Y-configuration stent deployment in two patients.The initial embolization degrees were Raymond class Ⅰ in 20 patients,class Ⅱ in five and class Ⅲ in the other two.The angiographic follow-up results of 21 patients(mean,8.4 months)showed that all aneurysms remained stable or improved;there was no in-stent stenosis,recurrence or retreatment.The clinical follow-up results of 26 patients(mean,12.6 months)showed that 23 patients displayed no symptoms,no disability or just slight disability;three patients remained with severe disability or moderately severe disability.The Enterprise stent is feasible and safe for endovascular embolization of wide-necked AcomA ruptured aneurysms.Further follow up is needed to assess the long-term efficacy of Enterprise stent placement in AcomA.