Risk of aneurysmal rupture: the importance of neck orifice positioning-assessment using computational flow simulation.

Objective: The aim of the present study was to clarify the risk of rupture in terminal-type intracranial aneurysms using computational flow simulation analysis.

Methods: First, idealized three-dimensional aneurysmal models were built from a solid voxel on the computer. We focused on round terminal-type aneurysms with the positioning of the neck orifice set according to the following three patterns in relationship to the axis of the parent artery: the Type-A neck orifice was positioned directly in line with the flow of the parent artery; the Type-B neck orifice was shifted 1.

A case of giant common carotid artery aneurysm associated with vascular Behçet disease: successfully treated with a covered stent.

Background: A carotid artery aneurysm associated with vascular Behçet disease is extremely rare and often difficult to treat. In this article, we explore a definitive therapeutic strategy for pseudoaneurysm with vascular Behçet disease.

Case Description: A 56-year-old man presented with swelling and a pulsatile subcutaneous mass of the left neck over a 6-month period.

Thrombophilic abnormalities among patients with cranial dural arteriovenous fistulas.

Objective: Dural sinus thrombosis often accompanies or precedes the development of dural arteriovenous fistulas (DAVFs). Because thrombophilic abnormalities can contribute to sinus thrombosis, we investigated the prevalence of such abnormalities and of venous sinus thrombosis in patients with DAVFs.

Methods: Thrombophilic factors were measured in 18 patients with DAVFs treated with embolization at our university hospital.

Contralateral meningeal artery supply of paramedian meningiomas.

Background: When resecting at falcine or parasagittal portion of paramedian meningiomas, intraoperative hemostasis often is difficult despite effective management of ipsilateral meningeal arteries. We attribute such difficulties to meningeal artery blood supply from the contralateral side. We retrospectively studied feeding arteries from both sides in case of paramedian meningioma in terms of patient and tumor characteristics.

De novo cerebral aneurysms manifesting as repeated subarachnoid hemorrhage and cerebral ischemic stroke--case report.

A 29-year-old man suffered repeated subarachnoid hemorrhage and cerebral ischemic stroke over a period of 6 years. Cerebral angiography at each episode disclosed development of multiple de novo aneurysms at the bilateral middle cerebral arteries (MCAs), internal carotid arteries, right anterior cerebral artery, and right vertebral artery. Two of the ruptured aneurysms were treated by surgical and endovascular treatment, but he died of the effects of rupture of a de novo right MCA aneurysm.