Publications by authors named "Hiroaki Shigeta"

Introduction: Primary intraosseous cavernous hemangiomas of the skull are very rare in the pediatric age group and usually slow-growing tumors.

Case Report: We present a case of 5-month-old girl with a left occipital cavernous hemangioma that is rapidly growing. The subcutaneous occipital tiny mass was first noted at birth, and the lesion became rapidly enlarged in size and became soft for 3 months.

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The benefit of postoperative chemotherapy for anaplastic ependymoma remains unknown. We report two pediatric patients with refractory anaplastic ependymoma treated with temozolomide (TMZ). We did not detect O(6) -methylguanine-DNA methyltransferase (MGMT) promoter methylation in tumor samples; however, MGMT protein expression was low.

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A sharp rise in intracranial pressure (ICP) was noted in a 6-year-old girl with Fontan circulation after surgical removal of a hematoma associated with intracranial hemorrhage. Inhalation of nitric oxide resulted in reduction of central venous pressure (CVP) and precipitous fall in ICP, which was otherwise resistant to conventional therapy. Specifically, the rate of fall of ICP (9 mm Hg) exceeded that of the CVP (3 mm Hg), indicating disproportionate CVP-ICP coupling.

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Subdural hematoma (SDH) is a well-known sequela of ventriculoperitoneal shunt insertion for hydrocephalus, usually spreads out over the cerebral convexity, and appears as a crescent-shaped lesion on imaging. The authors report the rare case of an infant with a globular SDH, which MR imaging revealed as a round mass lesion. A 13-month-old girl with a history of severe congenital hydrocephalus associated with myeloschisis underwent ventriculoperitoneal shunt placement after repair of myeloschisis and developed convulsive seizure.

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Background: Ultrasonic surgical aspirators have been used mainly for removing brain tumors. Because of their longitudinal and torsional tip, they are used for cutting the bone structures in spinal surgery installing a scalpel-type tip. The purpose of this report is to describe the effectiveness and surgical pitfalls of an ultrasonic bone curette in laminoplastic laminotomy and hemilaminotomy.

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The authors report a case of intratumoral hemorrhage in a pineal region choriocarcinoma during neuroendoscopic third ventriculostomy. A 12-year-old boy who presented with headache and vomiting had precocious puberty. Neuroimagings revealed a pineal region tumor with obstructive hydrocephalus and his serum HCG level was 4,280 mIU/ml.

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Flat films of methyl methacrylate-fluoroalkyl methacrylate copolymers were prepared, and their hydrophobicity was investigated. It was revealed that the F concentration directly affects the static hydrophobicity on the flat polymer surface in a systematic manner. Furthermore, the sliding behavior of a water droplet on these surfaces depends on the static hydrophobicity; the sliding motion changes from constant velocity to constant acceleration with an increase in the water contact angle.

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Purpose: The purpose of this article is to assess, in a 25-year retrospective study, the clinical outcome in children with craniopharyngioma.

Patient And Methods: From 1978 to 2002, 12 children younger than 15-year-old underwent treatment with surgery and/or radiotherapy for craniopharyngioma. The clinical course and outcome were reviewed.

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Case Report: A case of a histologically unclassified brain tumor in a 32-month-old boy is reported. He presented with vomiting, appetite loss, and right motor weakness. MR images revealed a huge mass in the left frontoparietal region that was enhanced after the administration of Gd-DTPA.

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