Yuka Matsumoto

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OBJECT Dysphasia is one of the most serious complications of skull base surgeries and results from damage to the brainstem and/or cranial nerves involved in swallowing. Here, the authors propose a method to monitor the function of the vagus nerve using endotracheal tube surface electrodes and transcranial electrical stimulation during skull base surgeries.(More)
BACKGROUND Failure of skull base reconstruction is a life-threatening issue. This study describes surgical techniques utilising various types of galeal flaps and reports on outcome of these procedures for skull base reconstruction. METHOD Clinical records of 136 patients (75 men, 61 women; mean age, 50.0 years) who required skull base reconstruction with(More)
Subarachnoid hemorrhage (SAH) volume was measured by three-dimensional computed tomography (3D-CT) and the correlation examined between the SAH volume and the occurrence of symptomatic vasospasm (SVS). Experimental (in vitro) hematomas were made with blood obtained from 10 volunteers. The hematoma volume was determined by actual measurements and by 3D-CT(More)
This study investigated responsiveness of beef cattle to various environmental stimuli by subjecting 15-16 Japanese Black cows to five tests repeated twice. Within individual behavioral measures, cows were moderately (repeatability = 0.54-0.70) or highly (repeatability = 0.74-0.89) consistent in flight distance during grazing and resting in the human(More)
We report 2 cases of primary central nervous system (CNS) lymphoma arising in the region of the optic nerve. For both patients, diagnosis of lymphoma was impossible without histological examination because of the rarity of the lymphoma location. The first case involved an 84-year-old woman who developed loss of vision and hypopituitarism. Intraoperative(More)
Ependymomas can relapse at the primary site and disseminate to the spinal cord. Furthermore, extraneural metastases are rare. We present a case of anaplastic ependymoma with extraneural metastasis, possibly caused by surgical seeding. An 18-year-old female was referred to us after experiencing frequent convulsive attacks. At age 9 years, she underwent(More)
We quantified the subarachnoid hemorrhage (SAH) volume in 64 patients on three-dimensional computed tomography (3D-CT) scans and studied the correlation between the SAH volume and the occurrence of symptomatic vasospasm (SVS). We studied 64 patients with SAH onset (day 0) and on days 1, 4, 7, and 14. We compared the hematoma volume by 3D-CT with 2D-CT on(More)
Current chemotherapeutic regimens have been used to successfully treat many children with acute lymphoblastic leukemia (ALL), but have resulted in an increased risk of late central nervous system tumors, most commonly meningioma, particularly in patients who have received cranial irradiation. We treated 3 young patients with World Health Organization grade(More)
A 37-year-old male presented with transorbitally penetrating bamboo fragments, which resulted in multiple brain abscesses during 30 years. Neurological examination revealed left blindness, oculomotor palsy, trigeminal nerve (V1) anesthesia, and cerebellar ataxia. Computed tomography demonstrated foreign bodies and two ring enhanced lesions in the(More)
Epidermoids tend to grow around and adhere to critical neurovascular structures, but total or maximal tumor removal is recommended to reduce the risk of recurrence. We describe our method of combined microscopic and endoscopic resection for extensive epidermoid tumors. Thirteen patients with epidermoid tumors located in the suprasellar, prepontine, or(More)
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