RT Journal Article SR Electronic T1 Management of aneurysmal recurrence after Woven EndoBridge (WEB) treatment JF Journal of NeuroInterventional Surgery JO J NeuroIntervent Surg FD BMJ Publishing Group Ltd. SP jnis-2022-019645 DO 10.1136/jnis-2022-019645 A1 Jildaz Caroff A1 Kevin Janot A1 Sebastien Soize A1 Gaultier Marnat A1 Jonathan Cortese A1 Cristian Mihalea A1 Septimiu Daniel Popescu A1 Léon Ikka A1 Vanessa Chalumeau A1 Sophie Gallas A1 Augustin Ozanne A1 Eman Eltantawy A1 Lamiae Grimaldi A1 Xavier Barreau A1 Denis Herbreteau A1 Laurent Pierot A1 Laurent Spelle YR 2022 UL http://jnis.bmj.com/content/early/2022/10/26/jnis-2022-019645.abstract AB Background Around 10% of Woven EndoBridge device (WEB)-treated intracranial aneurysms will need retreatment, and it is generally believed to be more challenging than retreatment after an initial coiling. We aim to report retreatment strategies and outcomes after initial WEB embolizations.Methods Databases from four treatment centers, containing consecutive aneurysms treated with a WEB between 2013 and 2022, were reviewed. Demographics, aneurysm characteristics, retreatment strategies and outcomes were collected and analyzed.Results From a 756 WEB database, 57 aneurysms were included. The global retreatment rate was 7.5% (95% CI 5.6% to 9.4%). The retreatment rate was significantly higher in the ruptured compared with the unruptured population (13% vs 3.9%, respectively, P<0.0001). Aneurysms were retreated on average 21.2 months after the initial WEB treatment (range 4.8–70 months). Surgery was performed in 11% and endovascular treatment in 89% of cases, consisting of flow diversion (48%), stent-assisted coiling (30%), coiling (12%), and second WEB placement (10%). Imaging follow-up was available in 88% of all WEB retreatments (50/57) (average 17 months, 49% digital subtraction angiography), demonstrating complete occlusion in 56% and ‘adequate’ occlusion in 88%. Morbidity was 5.3% (95% CI 0% to 12.0%) and mortality 0%. No patient experienced rebleeding during the follow-up period.Conclusion The retreatment rate after an initial WEB treatment seems to compare favorably with that of coiling. Endovascular treatment of recurrence following WEB implantation is feasible in most situations; it generally requires the use of a stent and leads to a high rate of satisfactory occlusion.Data are available upon reasonable request.