Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)   Publisher：The Japanese Society on Surgery for Cerebral Stroke  

The only way to prevent venous brain injury is to meticulously preserve the veins. In every surgical approach, there are various bridging veins blocking access to the subarachnoid space. It is necessary to understand venous anatomy, such as frontal bridging veins for the interhemispheric approach, sylvian veins for the pterional approach, and temporal bridging veins for the subtemporal approach. High-quality cerebral angiography is necessary for adequate pre-operative evaluation of venous anatomy.<br> With the advent of new-generation CT scanning, 3D-CT angiograms using 64 slice scanners offer an alternative means of preoperative evaluation of the venous system. Indeed, CT venogram might be superior to conventional cerebral angiography in obtaining 3D anatomical information before surgery. Meticulous microsurgical technique is essential to preserve the venous structure during surgery, as are the appropriate use of high magnification and good illumination, moist operative field, careful dissection and minimized retraction.<br> Vein preservation must be a critical part of surgical strategy, and perhaps the most important point in vein preservation is to keep the importance of those veins in mind at all times. To learn several techniques of vein preservation aids in the surgical strategy, and keeps the skills of the surgeon polished.<br>

DOI： 10.2335/scs.38.12

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Language：Japanese   Publishing type：Research paper (scientific journal)  

CiNii Books

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Other Link： http://search.jamas.or.jp/link/ui/2008152614

Language：English   Publishing type：Research paper (scientific journal)   Publisher：JAPAN NEUROSURGICAL SOC  

A 64-year-old man presented with a rare sporadic hemangioblastoma arising in the left optic nerve manifesting as left visual disturbance gradually progressive over 5 years. Magnetic resonance imaging revealed a well-enhanced mass in the left optic nerve. Partial resection of the tumor was performed via the frontoorbital approach. The histological diagnosis was optic nerve hemangioblastoma. Hemangioblastoma must be considered in the differential diagnosis of optic nerve tumors even in the absence of other lesions associated with von Hippel-Lindau disease.

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Language：English   Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCIENCE INC  

Background: Benign osteoblastoma arising from the temporal bone is extremely rare in elderly patients. We reviewed the literature on benign osteolblastoma of the temporal bone and now propose a new classification of this pathologic entity based on its anatomical location in the temporal bone.
Case Description: A 68-year-old woman presented with tinnitus and hearing disturbance with a duration of 1 year. Her neurologic examination revealed mixed hearing disturbance and hypogeusia. Preoperative computed tomography showed a bony destructive isodensity mass with calcified component involving the temporal bone. The FDG-PET scan showed high uptake on the lesion. After preoperative embolization on the day before surgery, the patient underwent tumor removal via a left infratemporal approach under neuronavigated guidance. The pathologic examination revealed a benign osteoblastoma.
Conclusion: We present the first case of FDG-PET showing high uptake on the lesion. Preoperative embolization is useful to reduce the amount of bleeding during the surgery. (c) 2006 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.surneu.2006.02.044

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER ASSOC NEUROLOGICAL SURGEONS  

Object. The goal of this study was to evaluate intraoperative power Doppler ultrasonography when used with a contrast-enhancing agent for operations on intracranial tumors.
Methods. Forty intracranial tumors were examined using power Doppler ultrasonography with a galactose microparticle-based ultrasonographic contrast-enhancing agent during operations on the brain. The tumors included 37 intracranial neoplasms (14 gliomas, six meningiomas, three hemangioblastomas, two malignant lymphomas, three other primary neoplasms, nine metastatic tumors, and three nonneoplastic lesions). All patients also underwent computerized tomography and magnetic resonance imaging, and all but three of the patients underwent digital subtraction (DS) angiography. Before injection of the ultrasonographic contrast agent, intra- and peritumoral power Doppler flow signals were detected in 32 of the intracranial tumors. After the injection, the signals were enhanced in blood vessels around the tumors and in the tumor parenchyma in 36 tumors. The duration of contrast enhancement continued for 70 to 365 seconds (mean 251.8 +/- 69 seconds) after the injection. Among the tumors, hemangioblastomas displayed particularly strong contrast enhancement. In these intracranial tumors, the echo signals obtained using contrast-enhanced power Doppler ultrasonography correlated with DS angiographic staining. Power Doppler ultrasonograms with the appropriate contrast agent provided better data on the precise real-time position of the tumors and their relationship to adjacent vessels than Ultrasonograms obtained before the injection of the contrast agent.
Conclusions. Intraoperative power Doppler ultrasonography performed using a contrast-enhancing agent can facilitate intraoperative real-time navigation and assessment of the intratumoral vasculature and peritumoral vessels, particularly for tumors having abundant vessels such as hemangioblastomas.

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Language：English   Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：English   Publishing type：Research paper (scientific journal)  

Purpose: To examine whether choline measurement by proton magnetic resonance (MR) spectroscopy in patients with malignant tumors is clinically meaningful in addition to routine MR imaging. Materials and Methods: MR spectroscopy and MR imaging were performed in 27 consecutive patients with suspected malignant disease. Malignancy was assessed based on total choline compound levels using proton MR spectroscopy, and the results were compared with MR imaging findings. Results: The sensitivity of MR imaging (84%, 21/25) was not significantly different from that of MR spectroscopy (88%, 22/25) among the 25 actual malignant diseases. Both MR imaging and MR spectroscopy produced two false-negative results. In one case, MR spectroscopy produced a false-negative result, whereas MR imaging produced a true-positive result. In two cases of benign breast disease, MR imaging produced false-positive results. MR spectroscopy produced one true-negative result and one false-positive result. Conclusion: Although choline measurement by MR spectroscopy is a useful tool in the evaluation of malignant disease, it should be reserved for patients with suspected malignant disease that cannot be detected by MR imaging, such as those with non-palpable prostate tumor with elevated sPSA levels.

Scopus

PubMed

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：RADIOLOGICAL SOC NORTH AMERICA  

DOI： 10.1148/radiol.2232010885

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：Japanese   Publishing type：Research paper (scientific journal)  

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：THIEME MEDICAL PUBL INC  

The authors examined the effect of bilateral jugular vein ligation (JVL) on loca cerebral blood flow (CBF). Local CBF was measured in the neocortex of the frontal lobe over a 1-week period in 10 freely moving male rats. Measurements were taken with the hydrogen clearance method before and after the rat underwent either an operation of bilateral JVL or a sham operation. After the sham operation, blood flow values did not change significantly compared with preoperative values. Blood flow values decreased rapidly in rats with JVL. For 3 hours after surgery, JVL values were significantly lower (p &lt;0.05) than preoperative values were, then gradually they recovered and reached preoperative values within 48 hours. Histopathologic study showed no remarkable parenchymal damages in the brain of rats with JVL. These results show that bilateral JVL produces a reversible decrease in the CBF and does not cause histopathologic brain damages.

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Language：English   Publishing type：Research paper (scientific journal)  

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DOI： 10.7887/jcns.3.114

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Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

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Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

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Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

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Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

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Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

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Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

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Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

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Language：English   Publishing type：Article, review, commentary, editorial, etc. (international conference proceedings)   Publisher：SPRINGER-VERLAG  

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