Choroidal fissure acts as an overflow device in cerebrospinal fluid drainage: morphological comparison between idiopathic and secondary normal-pressure hydrocephalus.

To clarify the pathogenesis of two different types of adult-onset normal-pressure hydrocephalus (NPH), we investigated cerebrospinal fluid distribution on the high-field three-dimensional MRI. The subarachnoid spaces in secondary NPH were smaller than those in the controls, whereas those in idiopathic NPH were of similar size to the controls. In idiopathic NPH, however, the basal cistern and Sylvian fissure were enlarged in concurrence with ventricular enlargement towards the z-direction, but the convexity subarachnoid space was severely diminished.

[Cost Comparison of Carotid Endarterectomy versus Carotid Stenting in Japan].

Carotid artery stenting (CAS) has been covered by the health insurance system in Japan since 2008. There have been few studies concerning medical costs and charges for patients who received CEA or CAS in Japan. The aim of this study was to elucidate the difference in the costs between the patients who received CEA and those who received CAS in Japan.

Interventional neuroradiological techniques for the treatment of aneurysms of the supra-aortic extracranial arteries.

Aneurysms in the supra-aortic extracranial arteries are rare in neurovascular pathology. Conventional surgery is effective but technically demanding and successful endovascular repair is reported. We treated 5 patients with supra-aortic extracranial artery aneurysms at our hospital (mean age 53.

Fibro-fatty volume of culprit lesions in Virtual Histology intravascular ultrasound is associated with the amount of debris during carotid artery stenting.

Objectives: This study aimed to evaluate the relationship between the amount of aspirated debris during distal balloon-protected carotid artery stenting (CAS) and the pre-intervention plaque composition, as assessed by Virtual Histology (VH) intravascular ultrasound (IVUS).

Methods: The study subjects were 25 consecutive patients (mean age, 73.0 +/- 5.

Angioplasty and stent deployment in acute sinus thrombosis following endovascular treatment of dural arteriovenous fistulae.

We report on the successful treatment of acute sinus thrombosis associated with endovascular treatment of intracranial dural arteriovenous fistulae (DAVF) by sinus angioplasty with stent deployment. A 76-year-old man presented with intracerebral hemorrhage, Cognard type IIa+b DAVF of the left sigmoid sinus, and type IIa DAVF of the torcular herophili. During transvenous sinus embolization, acute thrombosis of the stenotic lesion in the left transverse sinus occurred.

[Spontaneous improvement of idiopathic intracranial carotid artery dissection: a case report].

We report a rare case of spontaneous intracranial carotid artery dissection presenting with multiple infarctions. A 65-year-old man became aware of transient visual disturbance in the right eye and headache. Magnetic resonance imaging (MRI) at a local neurosurgical clinic depicted fresh multiple infarctions of the right cerebral hemisphere along with severe right carotid artery stenosis and delayed cerebral blood flow on the right side.

Different modalities of treatment of intracranial mycotic aneurysms: Report of 4 cases.

Background: Intracranial mycotic aneurysms, although rare neurovascular pathology, represented a neurosurgical challenge that required careful stepwise decision making. Different approaches for their management were used. We present our experience with 4 patients treated in terms of indications and efficacy of different treatment modalities.

Endovascular embolization vs surgical clipping in treatment of cerebral aneurysms: morbidity and mortality with short-term outcome.

Background: Endovascular embolization of cerebral aneurysms has evolved rapidly worldwide within the last years, and has gained more popularity at the expense of surgical clipping; however, both regimens have inherent risks. This study was undertaken to asses the cerebral complications associated with both modalities of cerebral aneurysm treatment.

Methods: We retrospectively reviewed the charts, operative and embolization reports, and imaging of patients who underwent surgical clipping or embolization for cerebral aneurysms at our institution between October 2001 and October 2004.

Tentorial dural arteriovenous fistula presenting symptoms due to mass effect on the dilated draining vein: case report.

Background: Tentorial dural arteriovenous fistula (AVF) presented symptoms due to mass effect on the dilated draining vein. We report a patient presenting left hemisensory disturbance because of compression of the midbrain by a dilated draining vein of the AVF. The AVF has disappeared completely by drainer clipping after feeder embolization.

Occlusion of the vertebral artery secondary to dissection of the subclavian artery--case report.

A 34-year-old man presented with occlusion of the left vertebral artery (VA) secondary to dissection of the left subclavian artery manifesting as vertigo, nausea, vomiting, and neck pain. On admission, he was alert with left limb and truncal ataxia. Magnetic resonance (MR) imaging and MR angiography showed left cerebellar infarction and occlusion of the left VA.

[Multiple intracranial aneurysms and vascular abnormalities associated with neurofibromatosis type 1: a case report].

We present an unusual case of multiple intracranial aneurysms, persistent primitive trigeminal artery (PPTA), and fenestration of the middle cerebral artery (MCA), associated with type 1 neurofibromatosis (NF 1). The patient was a 55-year-old woman in a state of semicoma. We observed widespread neurofibromas and café au lait spots on her trunk and limbs.

[Therapeutic strategy and outcome of stenting for subclavian and innominate artery occlusive disease].

We performed stenting for the subclavian artery (SA) and innominate artery occlusive disease in 14 patients between April, 2000 and March, 2003. In 13 of 14 patients, good dilatation was obtained with stenting. In one patient with left SA occlusion, true lumen could not be detained from either proximal or distal sides of the occluded lesion, so stent deployment was not performed.

[Comparison of the findings of multislice CT and angiography after stenting for supraaortic arteries].

We compared the findings of multislice computed tomography (MSCT) with angiography after stenting for supraaortic arteries. Twelve cases that underwent both MSCT and angiography were evaluated. In 4 cases, stenotic findings were shown by neither MSCT nor angiography.

Ca2+ entry channels involved in contractions of rat aorta induced by endothelin-1, noradrenaline, and vasopressin.

Endothelin-1 (ET-1) has been shown to activate three types of Ca2+ channel, namely two Ca2+-permeable nonselective cation channels (designated NSCC-1 and NSCC-2) and a store-operated Ca2+ channel (SOCC), and that these channels can be discriminated by Ca2+ channel blockers such as LOE 908 (a blocker of NSCC-1 and NSCC-2) and SK&F 96365 (a blocker of NSCC-2 and SOCC). This study pharmacologically compared Ca2+ entry channels involved in contractions of rat thoracic aorta without endothelium induced by ET-1, noradrenaline (NA), or arginine-vasopressin (AVP). These agonists-induced contractions of aortic rings without endothelium and increases in the intracellular free Ca2+ concentration ([Ca2+]i) of cultured aortic smooth muscle cells were abolished by removal of extracellular Ca2+.

[A case report of a scalp dermoid cyst containing watery-clear fluid].

We report a case of a 7-month-old female with a dermoid cyst on the anterior fontanelle. She was born with a vacuum extractor. Two weeks later, her scalp on the anterior fontanelle bulged.

Intrathecal and intraperitoneal germinomas occurring 20 years after total removal of a pineal teratoma. Case report.

In 1980, a 10-year-old boy was admitted to the authors' hospital with consciousness disturbance and vomiting. Computerized tomography (CT) scans revealed a pineal mass lesion and hydrocephalus. The tumor was totally removed and a ventriculoperitoneal (VP) shunt was inserted.