Publications by authors named "Junya Jito"

Background: The trigeminocerebellar artery (TCA) is a branch of the basilar artery supplying both the trigeminal nerve root and the cerebellar hemisphere. Despite its proximity to the trigeminal nerve, only a few cases of trigeminal neuralgia (TN) caused by TCA compression of the trigeminal nerve have been reported. Moreover, TN caused by blood vessel penetration of the trigeminal nerve is very rare.

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Background: "Headbanging" is the slang term used to denote violent shaking of one's head in time with the music. This abrupt flexion-extension movement of the head to rock music extremely rarely causes a subdural hematoma.

Case Description: A 24-year-old female was admitted to our department because of right sided partial seizure and acute or subacute subdural hematoma over the left cerebral convexity.

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A polyethylene glycol (PEG) hydrogel sealant recently has been approved as an adjunct to sutured dural closure in Japan. We treated consecutive six patients with PEG hydrogel sealant in posterior fossa operation. Three of six cases suffered delayed cerebrospinal fluid (CSF) leak after watertight dural closure with the PEG hydrogel sealant, although there was no leak case which was treated with fibrin glue, before 2 years until the adoption of the new material.

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Meningiomas sometimes appear to stop growing after attaining a large size. Commonly used exponential growth models do not reflect this phenomenon. We attempted to find the best curve to simulate their growth.

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Article Synopsis
  • * Nine rats received whole brain radiation (40 Gy), and the FA values in their corpus callosum were measured post-irradiation, showing a decrease between 30 to 42 weeks, followed by a recovery at 48 weeks.
  • * Histological analysis indicated that changes in myelin structures and increases in hypertrophic GFAP-positive cells and dilated vessels correlated with the FA recovery, while Olig2-positive cells decreased significantly by week 48.
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Purpose: To determine the main histological components that affect fractional anisotropy (FA) in postnatal development of the rat corpus callosum and compare FA values with histological changes evaluated quantitatively.

Materials And Methods: Diffusion tensor image (DTI) data of the rat (postnatal 1-10 weeks) corpus callosum were obtained with a 7.0 T MR scanner.

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Article Synopsis
  • - The study examined 50 surgical cases of meningiomas and found varying degrees of capsule formation and arachnoid membrane integrity, with correlations to tumor grade and characteristics like size and perifocal edema.
  • - Brain invasion by meningiomas was assessed, revealing GFAP-positive cells in invasive tumors and degenerative changes in surrounding axons, indicating an impact on nearby brain tissue.
  • - The tumors typically showed a collagen type 4-positive boundary, but atypical and anaplastic tumors lacked this feature; no link was found between matrix metalloproteinase expression and arachnoid disruption or brain invasion.
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Tissue plasminogen activator (tPA) levels were investigated in the cisternal fluid of patients with subarachnoid hemorrhage treated with single intracisternal injection of recombinant tPA during radical surgery for ruptured aneurysms. Seven patients received different doses of tPA: two of 400 microg/ml, three of 500 microg/ml, one of 700 microg/ml, and one of 800 microg/ml in a total amount of 20 ml distilled water at pH 7. Cerebrospinal fluid samples were taken directly from the cisternal fluid at 15-minute incubation after injection, immediately after irrigation during surgery, and by lumbar tap 2 days after surgery.

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We report a case of a 7-month-old female with a dermoid cyst on the anterior fontanelle. She was born with a vacuum extractor. Two weeks later, her scalp on the anterior fontanelle bulged.

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In 1980, a 10-year-old boy was admitted to the authors' hospital with consciousness disturbance and vomiting. Computerized tomography (CT) scans revealed a pineal mass lesion and hydrocephalus. The tumor was totally removed and a ventriculoperitoneal (VP) shunt was inserted.

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