Discordant Sign Identified by Angiogram in Intracranial Dissection

Nothing to report. Data generated or analyzed during the study are available from the corresponding author by request. Video S1. The pre-procedure angiogram on the anterior–posterior projection indicated a thread-like filling defect involving the middle M1 segment of the right middle cerebral artery with a medium dilatation. The filling defect divided the vessel into two lumens, and all lenticulostriate arteries originating from the upper lumen. There was a mild stenosis at the A1 segment of the right anterior cerebral artery, as well as a mild stenosis at the C6 segment of the right internal carotid artery. A spiral, corkscrew-like filling defect at the M1 segment of the right middle cerebral artery was detected on the lateral projection. The three-dimensional angiogram confirmed the previous findings. The post-procedural angiogram showed that the right middle cerebral artery was recanalized after stent implantation, the false lumen disappeared, and the lenticulostriate arteries were patent. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.