[Willis covered stent for paraclinoid aneurysms:efficacy and mid-long-term follow-up results].

The clinical data and follow-up results of 27 paraspinoid aneurysms treated by Willis covered stent (WCS) in Department of Neurosurgery, Army Medical University from May 2014 to January 2021 were retrospectively analyzed. Among them, 17 cases (63.0%) were treated with WCS alone, and 10 cases (37.0%) were assisted with coiling embolization. During the follow-up, postoperative internal leakage occurred in 2 patients(7%), of which 1(type Ⅰ) wasself-healing and the other 1 (type Ⅲ) was cured by WCS implantation again. The remaining patients had no aneurysm recurrence, unobstructed parent artery, stent displacement and internal stenosis. 92.6% (25/27) of the improved mRS scores were good. WCS is a safe and effective method for the treatment of parabedinal aneurysms.