@article {Levitt487, author = {M.R. Levitt and M.S. Park and F.C. Albuquerque and K. Moon and M.Y.S. Kalani and C.G. McDougall}, title = {Posterior Inferior Cerebellar Artery Patency after Flow-Diverting Stent Treatment}, volume = {37}, number = {3}, pages = {487--489}, year = {2016}, doi = {10.3174/ajnr.A4550}, publisher = {American Journal of Neuroradiology}, abstract = {BACKGROUND AND PURPOSE: The rate of PICA occlusion after flow-diverting stent placement for vertebral and vertebrobasilar artery aneurysms is not known. The purpose of this study is to determine the medium-term rate of PICA patency and risk factors for occlusion after such aneurysm treatment.MATERIALS AND METHODS: Patients were identified who had vertebral or vertebrobasilar artery aneurysms and who were treated by placing a flow-diverting stent across the PICA ostium. Demographic and procedural factors associated with stent placement were recorded. Patency of the PICA was evaluated immediately after stent placement and on follow-up angiography.RESULTS: Thirteen patients with vertebral or vertebrobasilar artery aneurysms were treated in the study period, of whom 4 presented with subarachnoid hemorrhage. The average number of devices that spanned the PICA ostium was 1.77 (range, 1{\textendash}3), with no immediate PICA occlusions. There were no postoperative strokes in the treated PICA territory, although there was 1 contralateral PICA-territory stroke of unclear etiology without clinical sequelae. In 11 patients with follow-up angiography at a mean of 10.6 months (range, 0.67{\textendash}27.9 months), the PICA patency rate remained 100\%.CONCLUSIONS: Flow-diverting stent placement across the PICA ostium in the treatment of vertebral and vertebrobasilar artery aneurysms may not result in immediate or midterm PICA occlusion.FDSflow-diverting stent}, issn = {0195-6108}, URL = {https://www.ajnr.org/content/37/3/487}, eprint = {https://www.ajnr.org/content/37/3/487.full.pdf}, journal = {American Journal of Neuroradiology} }