Hidetoshi Matsui

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Clear cell meningioma is a rare morphologic form of meningioma. This case report describes a very rare case of multifocal clear cell meningioma in the thoracic and lumbar spine. A 9 year old patient presented with back pain and popliteal pain, which were aggravated by trunk motion and knocking. Magnetic resonance imaging (MRI) suggested a meningioma at the(More)
In lymphoproliferative disorders, primary involvement of the peripheral nerve is rare. This report describes a very rare case of a solitary extranodal T-cell lymphoma of the sciatic nerve. Magnetic resonance imaging and gallium scintigraphy were useful for the identification of the lesion of the sciatic nerve. The histological analysis of an open-biopsy(More)
Time-related changes of laminectomy-induced cauda equina adhesions were investigated by MRI in ten patients with degenerative spinal disease who underwent posterior surgery to the lumbar spine; seven had disc herniations and three spinal stenosis. Axial MRI was performed before and 3, 7, 21 and 42 days after surgery. Cauda equina adhesions were most severe(More)
Bazex syndrome is a rare paraneoplastic dermatosis. The underlying malignancy frequently is squamous cell carcinoma of the upper aerodigestive tract or cervical lymph nodes from an unknown primary site. We report a 63-year-old man with squamous cell carcinoma of cervical lymph nodes from an unknown primary site. He developed a mass on the right side of his(More)
We report the characteristics of magnetic resonance imaging (MRI) of cystic intradural extramedullary spinal cord tumors (cystic neurilemmoma, epidermoid cyst, and enterogenous cyst). T1-weighted MRI enhanced with gadolinium-DTPA clearly demonstrated the rim morphology of these tumors. The comparison between the rim enhancement pattern and histopathological(More)
OBJECTIVE AND IMPORTANCE Although dural arteriovenous malformations (AVMs) are considered to be acquired, no conclusive evidence has been obtained. The first case of dural AVMs of the lumbar spine that showed evidence supporting their being acquired lesions is described. CLINICAL PRESENTATION A 27-year-old man was admitted to our hospital in November(More)
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