Hiroaki Shigeta

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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,(More)
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. He was diagnosed as(More)
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. The mass was removed three times because of its recurrence. Histologically, the(More)
Three hundred and eighty three cases with head injury were admitted to our hospital during period from March 1985 to October 1986. Among these cases, 16 (4.2%) had subarachnoid hemorrhage as revealed on computerized tomography (CT) scan; other CT findings included epidural hematoma, subdural hematoma and/or cerebral contusion. Traumatic subarachnoid(More)
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(More)
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. With TMZ treatment,(More)
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. RESULTS The(More)
This study was designed to detect patients with type I silent myocardial ischemia (SMI) at rest by assessing the symmetry of the electrocardiographic (ECG) T wave using the spatial velocity electrocardiogram (SVECG). In this study, the ECG T waves in patients with SMI were symmetric compared with those in normal subjects, and the the c/a ratio in the(More)