Junpei Nitta

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OBJECTIVE Distal posteroinferior cerebellar artery (PICA) aneurysms are rare and have not been well investigated previously. We report our series of 24 patients with 27 distal PICA aneurysms. METHODS All patients with distal PICA aneurysms that were surgically treated at Shinshu University Hospital and its affiliated hospitals between 1983 and 2001 were(More)
OBJECTIVE We describe an easy and useful method for treating hemifacial spasm related to the vertebral artery. METHODS The technique entails the manufacture of a dural belt harvested from the cerebellar convexity dura and a dural bridge made at the petrous dura combined with the use of an aneurysm clip. The dural belt holds the vertebral artery and is(More)
OBJECT The authors evaluated the efficacy of emergency embolectomy in patients with acute middle cerebral artery occlusion (MCAO). METHODS A retrospective review of the charts for patients undergoing embolectomy at the authors' institution was performed. Between October 1997 and May 2004, 12 patients (mean age 70 years) with acute MCAO were treated using(More)
Selection of the operative route for cavernous sinus related lesions, the extent of the exposure necessary, the need for intraoperative control of the carotid artery and feasibility and need of radical resection depend on the histological nature of the tumour. The age and sex of the patient, principal presenting signs, size of the tumour, extent of cranial(More)
Two cases of giant aneurysm of the horizontal segment of the anterior cerebral artery (A1) are presented. The rare occurrence of a giant aneurysm in this location necessitates evaluation of the cross-flow through the anterior communicating artery when planning surgical strategy. On the basis of angiographic findings, trapping of the A1 on both sides of the(More)
OBJECTIVE AND IMPORTANCE We report a rare case of pleomorphic astrocytoma in the pineal region that took a benign course despite pleomorphism. CLINICAL PRESENTATION A 30-year-old woman suddenly developed right hemiparesis followed by loss of consciousness. A computed tomographic scan revealed a mass in the pineal region accompanied by obstructive(More)
OBJECTIVE AND IMPORTANCE A rare case of an aneurysm arising at the fenestration of the P2 segment of the posterior cerebral artery is reported. CLINICAL PRESENTATION A 37-year-old man presented with severe headache and disturbance of consciousness. Computed tomographic scanning showed diffuse subarachnoid hemorrhage. Cerebral angiography revealed an(More)
We report the surgical results in patients with acute cerebral main-trunk occlusion in the anterior circulation. Between April 2004 and March 2005, 26 patients were surgically treated within 24h after the onset. The occlusion occurred in the internal carotid artery in 10 patients, in the middle cerebral artery in 15, and in the anterior cerebral artery in(More)
OBJECTIVE The purpose of this paper was to analyse the outcome of the patients with acute middle cerebral artery (MCA) occlusion treated by open embolectomy. METHODS A clinical chart review was retrospectively conducted for 30 patients who had MCA occlusion and were treated with open embolectomy. According to the Glasgow Outcome Scale, the patients'(More)
Acute ischemic stroke attributable to cervical internal carotid artery (ICA) occlusion is frequently associated with severe disability or death and is usually caused by atherosclerosis. By contrast, the cardioembolic cervical ICA occlusion is rare, and feasibility of urgent recanalization remains unclear. We present the first study in the literature that(More)