Isolating An Iatrogenic Pseudoaneurysm In The Cisternal Segment Of The Ica By Deploying A Willis Covered Stent In The Stenotic Parent Artery

The Willis covered stent (WCS) has recently been shown to have a satisfactory effect in isolating pseudoaneurysms. Due to the strict requirement for the WCS diameter relative to the artery diameter, it remains unclear whether a WCS can be deployed in a severely stenotic parent artery to treat pseudoaneurysms. In this study, we report a case of an iatrogenic intracranial pseudoaneurysm, which was successfully isolated by deployment of a 3.5 mm x 7.0 mm WCS in the severely stenotic parent artery with a diameter of only 1.7 mm. We elaborate in detail on the surgical procedure and treatment experience in this particular case. To best of our knowledge, deployment of a WCS in such a severely stenotic parent artery has not yet been reported. According to our experience, deployment of a WCS in a severely stenotic parent artery to isolate an intracranial pseudoaneurysm is safe and effective. However, assessing the original diameter of the stenotic parent artery is crucial before formulating a surgical plan.