<b>Background and Purpose:</b> Endovascular treatment (EVT) for acute vertebrobasilar intracranial atherosclerosis-related large vessel occlusion (ICAS-LVO) and its outcomes are not well known.
Identification of intracranial, atherosclerosis-related, large vessel occlusion (ICAS-LVO) is important to set up an optimal endovascular treatment strategy, as most ICAS-LVOs require specific endovascular modalities for efficient recanalization.
Intracranial atherosclerosis of the anterior circulation (anterior ICAS) and intracranial atherosclerosis of the posterior circulation (posterior ICAS) are thought to involve different pathogeneses and risk factors.