A Case of Blood Blister-Like Aneurysm with Subarachnoid Hemorrhage after Endovascular Mechanical Thrombectomy of Internal Carotid Artery

Key Points

• This case examines the formation of a blood blister-like aneurysm (BBA) and subsequent subarachnoid hemorrhage following endovascular treatment for internal carotid artery occlusion.
• An 80-year-old female underwent mechanical thrombectomy for right ICA occlusion.
• A BBA was formed and rapidly enlarged after the procedure, leading to rebleeding before further planned intervention.
• Clinical findings suggest possible vascular endothelial injury due to the catheter or stent retrieval.
• BBA formation was confirmed post-thrombectomy, resulting in fatal rebleeding before scheduled intervention.
• No previous cases of BBA after thrombectomy have been published, making this report significant for vascular interventions.
• Emphasized the need for careful selection of devices and early post-operative imaging to monitor for BBA.