A case of subarachnoid hemorrhage caused by rupture of cavernous segment carotid artery aneurysm
Wang Xi'ao
Yu Zhao
Xu Shancai
Abstract：Cavernous segment carotid artery aneurysms typically present with an indolent course,but when located at the posterior knee and penetrating the"vulnerable areas"of the vessel wall or the fibrous ring of the dura mater,they are prone to causing subarachnoid hemorrhage.This study reported a case of a 52-year-old female patient who presented with sudden severe headache and right ptosis.Imaging revealed a multilobular aneurysm located at the posterior knee of the right cavernous segment,measuring 14.71mm×7.80 mm×15.13 mm,with a girdle sign and thinning of the sphenoid sinus bone,suggesting the aneurysm had crossed the dural fibrous ring into the subarachnoid space.The patient underwent emergency external ventricular drainage and stent-assisted coil embolization.Contrast medium extravasation was observed during angiography,and a flow-diverting stent was immediately placed.Postoperative angiography showed complete occlusion of the aneurysm.The patient's death on the sixth day after the operation may have resulted from cerebral ischemia caused by vasospasm.This case highlights that cavernous segment carotid aneurysms with"girdle sign",lateral"vulnerable area"protrusion,and sphenoid sinus bone defect are lesions with markedly high risks,that require early comprehensive intervention.
Keywords：Cerebral aneurysmCavernous segment carotid arteryStent-assisted coil embolization
Publication Date：2025-11-18
Online Publishing Date：2025-12-02(First online date of this platform, not the publication date of the document)
Pages：5( 772-776 )