Emergent revascularization of acute tandem vertebrobasilar occlusions: Endovascular approaches and technical considerations-Confirming the role of vertebral artery ostium stenosis as a cause of vertebrobasilar stroke.

•Tandem vertebrobasilar occlusions were safely managed with endovascular techniques.•Basilar artery access was via the contralateral (clean-road) or occluded vertebral artery (VA) (dirty-road).•Stentriever-based thrombectomy was via antegrade or reverse revascularization variants.•Clinical outcomes seemed to equipoise results for isolated basilar artery occlusion.•These tandem occlusions confirm VA ostium stenosis as a cause of vertebrobasilar stroke.