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UNLABELLED Backgrounds and Purpose- The authors evaluated the incidence of rupture of unruptured intracranial saccular aneurysm during observation. METHODS Between January 2003 and December 2006, a total of 419 patients with 529 unruptured intracranial saccular aneurysms were observed without treatment. The mean follow-up duration was 905.3 days. Aneurysm(More)
BACKGROUND AND PURPOSE The natural history of unruptured intracranial aneurysms remains unclear, and management strategy is not well defined. METHODS From January 2003 to December 2012, we enrolled patients with aneurysm in our institution. In total, 2252 patients with 2897 aneurysms were eligible for analysis, and 1960 eligible aneurysms were(More)
Visual allesthesia, in which visual images are transposed from one homonymous half-field of visual field to another, is a rare phenomenon. Palinopsia is the persistence or recurrence of visual images after the exciting stimulus object has been removed. Some authors have reported these phenomena, but these pathophysiology has not been understood. We report a(More)
OBJECT The purpose of this study was to evaluate initial experiences in a surgical operating room (OR) with a multipurpose angiography unit, which offers integrated neurosurgical and radiological capabilities. METHODS A specially designed biplane digital subtraction (DS) angiography system was installed in the neurosurgery OR. The new suite, which allows(More)
OBJECTIVE We developed a new liquid embolic agent, an aqueous solution of thermoreversible gelation polymer (TGP) for the treatment of cerebral aneurysms. This polymer solution has the unique characteristics that allow it to solidify at a specific temperature without solvent. We performed an experimental aneurysm embolization using this liquid embolic agent(More)
Modern imaging technologies, such as computed tomography (CT) angiography, magnetic resonance (MR) angiography, and digital subtraction (DS) angiography are widely used for pretreatment evaluation of cerebral aneurysms, but the relative accuracies of these modalities are unclear. This study compared the measurements of aneurysm neck and dome height and(More)
The report describes a rare case of a patient with a calcified cerebellar metastasis arising from a primary ovarian cancer. The patient was a 33-year-old woman with a long history of stage IIIc ovarian cancer who had undergone transabdominal hysterectomy and bilateral oophorectomy followed by chemotherapy with gemcitabine hydrochloride. Incidentally,(More)
BACKGROUND Fully equipped high-end digital subtraction angiography (DSA) within the operating room (OR) environment has emerged as a new trend in the fields of neurosurgery and vascular surgery. OBJECTIVE To describe initial clinical experience with a robotic DSA system in the hybrid OR. METHODS A newly designed robotic DSA system (Artis zeego; Siemens(More)
Aneurysms of the petrous internal carotid artery are rare, and surgical treatment of the aneurysm in the petrous bone carries high risk with procedure. We report a case of large petrous internal carotid artery aneurysm associated with otitis media. A 58-year-old female was admitted to our institution with left hearing loss and facial palsy. She had 4-year(More)
INTRODUCTION To evaluate potential feasibility of new liquid embolic agent, thermoreversible gelation polymer (TGP), for embolotherapy. METHODS TGP is a liquid polymer that was originally developed as a cell culture medium for tissue engineering. TGP becomes liquid at temperatures lower than the sol-gel transition temperature (TT) and becomes a gel at(More)