Abstract
A case of surgically treated intracranial dissecting aneurysm involving left internal carotid artery (ICA) and middle cerebral artery (MCA) was described. This 62-year-old woman presented with cerebral infarction in the left MCA distribution. Cerebral arteriogram revealed a dissecting aneurysm with a finding of double lumen, extending from left intracranial ICA to M1, which remained patent for 2 months. A silicone encircling hemostatic clip with mild encircling force was surgically applied to the whole lesion, attending selective thrombosis of pseudolumen with patent true lumen and prevention of further dissection. However, the true vascular lumen attenuated and the pseudolumen became dominant without further symptoms.
