Yoshiki Sugiura

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Multinodular and vacuolating neuronal tumors (MVNT) have been recently referred to as a distinctive neuronal tumor entity based on histopathological findings. They are characterized by multiple tumor nodules, vacuolar alteration and widespread immunolabeling for human neuronal protein HuC/HuD. Only 13 cases have been reported in the literature to date and(More)
Tumors of the intramedullary spinal cord are a rare entity, accounting for only 4–10 % of all central nervous system tumors [1]. Glial tumors are the most frequent histological type of intramedullary spinal cord tumors, with ependymomas comprising 60–80 % of tumors originating from the glial tissue. While astrocytic tumors are second in prevalence to(More)
Here we describe the case of a patient with a wide-necked unruptured aneurysm arising at origin of a persistent primitive trigeminal artery (PTA) variant from the right internal carotid artery (ICA), supplying the territory of the right superior cerebellar artery and the anterior inferior cerebellar artery. To preserve the ICA and the PTA variant, coil(More)
The introduction of the balloon remodeling and stent-assisted technique has revolutionized the approach to coil embolization for wide-neck aneurysms. The purpose of this study was to determine the frequency of thromboembolic events associated with single balloon-assisted, double balloon-assisted, and stent-assisted coil embolization for asymptomatic(More)
Malignant gliomas of the optic pathway are rare, and their genetic alterations are poorly understood. We describe a 64-year-old woman with anaplastic astrocytoma originating from the optic pathway, together with the molecular features. She presented with progressive visual field loss, and a biopsy sample was obtained from the lesion in the optic chiasm. She(More)
INTRODUCTION Glioblastoma multiforme (GBM) is a very rare type of tumor involving the pineal region. No case of pineal region GBM with tumoral hemorrhage has ever been reported. Here, we present the first such case report. CASE REPORT A 65-year-old man presented with sudden-onset disturbance of consciousness. CT revealed intraventricular hemorrhage and(More)
Chondromas are rare benign tumors that commonly originate from the base of the skull, while those arising from the dura mater are less common. Although the molecular mechanism underlying its pathogenesis remains largely unknown, 12q13-15 rearrangements followed by the activation of HMGA2, which is associated with cell proliferation, have been reported in(More)
A 9-year-old girl struck the left side of her head on a doorknob, after which she gradually developed swelling. She was treated conservatively at another hospital before being referred and admitted to our hospital 9 days after injury, with complaints of exophthalmos and diplopia. Computed tomography (CT) scanning and magnetic resonance imaging (MRI)(More)
The results of preoperative embolization for skull base meningiomas were retrospectively evaluated to confirm the efficacy of this procedure. Skull base meningiomas that were treated with preoperative embolization were evaluated in 20 patients. The occluded arteries, embolic materials, treatment time, excision rate, neurologic manifestations, and(More)
A 12-year-old girl presented with a generalized convulsion. She had regularly consulted pediatricians for an adjustment disorder over the course of 2 years and had experienced a transient episode of unconsciousness without convulsion 5 months earlier. A mental status examination revealed depressed affect, but general physical and neurological examinations(More)