Satoru Shimizu

..Our simple modification facilitates operating microscope manipulation and reduces surgeon fatigue...

..The aim of this study was to clarify the spatial dimensions of a high-positioned foramina to allow for the safe performance of this maneuver...

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..g., with initial detachment of large meningiomas from the dura in the deep region...

..Formation of standing edges of the sheet facilitates holding of the flaps for secure and more rapid suturing than the conventional approach using a flat sheet...

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..During prolonged neurosurgical procedures, anesthetized patients are at risk for position-related complications. We report a rare combination of neck swelling and brachial plexopathy as operative position-related complications...

..This minor modification provides convenience to the surgeon during operations...

..Awareness of this rare presentation may aid in the diagnosis and surgical management of these patients...

..This method is ideal for bone cuts in cosmetic cranioplasty; is easy and safe to perform, is inexpensive, and avoids the need for flap fixation with metal devices...

..However, when the MMA pierces a bony tunnel in the middle meningeal groove it is easily damaged upon bone flap elevation. We have performed an anatomic study of this tunnel to render pterional craniotomy safer...

..For safe drilling of the medial part, the dura beside the wing is usually retracted with a metal instrument and damage to the instrument may occur. We developed an alternative retraction method that uses a cardboard shield...

..Finally, a catheter is placed by laparotomy. We were able to change position easily in 20 patients weighing 47-85 kg (mean 69.6 kg). This technique reduces the labor required for position change and preserves sterility...

..Anatomical knowledge of the AMA, including its anastomoses and layer relationships to the surrounding structures, may help to perform treatment modalities in this region rationally...

..7 mm) resulted in opening of 8 of the 10 obstructed EVD devices. We encountered no major procedure-related complications. This modified EVD fixation method facilitates depth adjustments for reopening the obstructed drain...

..None among over 100 patients developed an objectionable bulge attributable to displacement of the filler. Our technique requires no special instruments or materials and decreases the risk of cosmetic problems...

..The authors performed an anatomic study to clarify the risk of damage to the endolymphatic sac and endolymphatic duct during this maneuver...

..No correlation between the locations of the anatomical points and ventricular size was found. The present study could not define a standard external aim point. Tailored preoperative planning of the trajectory is recommended...

..Despite development of computer-assisted neurosurgical navigation, learning by dissecting anatomic specimens is still important...

..We performed a cadaveric study to clarify the anatomic relationship between the origins of the segmental arteries in the aorta and the vertebral column...

..These factors should thus be kept in mind as potential sources of obstruction of the valve system, especially in patients susceptible to episodes of head impact...

..The authors present the difference of shortening the ventricular shunt catheter associated with growth of the cranium between the frontal and parieto-occipital access, a key for long patency of the shunt implanted in children...

..05). Thus, the prognosis for cystic GBM was significantly better than that for noncystic GBM, possibly because cystic GBMs showed comparatively little infiltration of the peritumoral brain parenchyma...

..The laparotomy must be closed meticulously to prevent this type of migration...

..The objective of the current study was to examine anatomic features of the petrous carotid and its branches as related to the variety of approaches currently being used for its exposure...

..The objective of this study was to examine the anatomic features of the vidian canal, nerve, and artery, as well as the clinical implications of our findings...

..The authors conclude that placement of the CHPV system may be contraindicated in patients with a known habit of head banging...

..Therefore, the contrast medium may have affected the meningioma after cerebral angiography...

..The surgeon can detect tumor infiltration far more objectively and with less effort using this system during tumor resection...

..The fluorescent cyst consisted of tumor cells. The authors conclude that fluorescence diagnosis performed using 5-ALA can inform the choice of removing hemangioblastoma cysts...

..e. pneumocele within the fibrous sheath surrounding the catheter, is a differential diagnosis to cerebrospinal fluid collection in patients with subcutaneous swelling around the catheter...

..Preoperative diagnosis of intraventricular cavernous angioma is difficult based on neuroimaging. Neuroendoscopy is effective for diagnosis and the decision-making process regarding treatment...

..We studied atypical linear fractures that were not visualized clearly, because a specific anatomical configuration hampered the passage of x-rays...

..Evaluation of head injury by only axial CT may miss such fractures and result in sequelae, so diagnosticians should be alert to the possible presence of this type of fracture...

..B12 deficiency due to malabsorption. The mechanism and causal relationship between Crohn's disease and sinus thrombosis is discussed...

..We evaluated whether the presence of lacunar skull deformity (LSD) with myelomeningocele is a predictive factor for subsequent hydrocephalus development...

..Our findings indicate that PPIX fluorescence can be observed in peritumoral edematous areas that are free of neoplastic cells, because PPIX produced by neoplastic cells leaks into the surrounding edematous area...

..In contrast, all weak positive areas of recurrent malignant gliomas must be resected. Weak positive areas of the peritumoral edema surrounding metastatic brain tumors should be removed carefully as false positive results are common...

..After resection, the patient underwent radiation therapy followed by chemotherapy with cisplatin and etoposide but died of tumor progression 15 months after his second hospitalization...

..Usefulness of transcervical approach to hypoglossal schwannoma with paraspinal extension is described herein...

..The authors conclude that the intraoperative use of laser spectroscopy can allow the diagnosis of infiltrating tumor and the detection of boundaries of the infiltrate when standard fluorescence techniques fail...

..At craniotomy the dura shrinks due to the drying effect of illumination and air exposure, rendering primary closure of this tissue difficult. We have developed a new technique, "dural scoring", that facilitates primary dural closure...

..The valve pressure did not change after the television was placed on a high stand out of reach. We should recognize that there are many sources of weak magnetic fields that may influence a programmable valve in everyday life...

..We employed a commercial loupe on the program transmitter unit to sufficiently enlarge the view of the cam for clear identification. We recommend that the manufacturer to incorporate a loupe to provide a more sophisticated product...

..Glioblastoma has a poor prognosis, with few therapeutic options if it recurs. We report a case in which we were able to inhibit the growth of a recurrent glioblastoma by weekly single-dose administration of interferon-beta...

..No patient experienced shunt migration. The technique is easy and safe to perform, avoids leaving a dead space around the peritoneal catheter, and prevents catheter migration...

..The authors here chronicled the normal development of ossification centers, sutures, and synchondroses in the chondrocranium by radiographic examination...

..As the fixation of cranial bone flaps with titanium miniplates may produce esthetically objectionable bulges especially on the forehead covered with thin scalp, we developed a technique that solves this problem...

..This case of acquired LSD indicates that abnormal disorganized collection of collagen fibers of the skull plates may be triggered by iatrogenic intracranial hypotension even after infancy...

..The clinical findings suggested the seizures were due to irritation of the brain parenchyma by the migrated system. Proximal migration of a VP shunt may cause both shunt failure and additional focal symptoms...

..In addition, both patients were immunocompromised due to radiotherapy and steroid therapy. The mechanism of developing resistancy and the management of VRE meningitis is discussed...

..Aplasia of the right internal carotid artery was diagnosed. The origin of the hemorrhage was thought to be the irregularly opacified right A2 segment, which had been subjected to long-standing hemodynamic stress as collateral vessel...

..Retro-odontoid disc herniation causing cervical myelopathy is very rare. We primarily discuss the surgical management of retro-odontoid disc herniation...

..The patient was treated by conservative therapy and improved with rest. The unusual clinical presentation with dilation of two epidural veins indicates the diagnostic value of MR imaging in cases of spontaneous intracranial hypotension...

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..Over the course of the next 4 years the tumor decreased in size. The authors suggest that SRS constitutes good adjuvant treatment for regrowing residual SFTs not amenable to reoperation...

..After 8 months of continued conservative treatment, in which the patient wore a Philadelphia collar, the cyst spontaneously regressed. Subsequently, a C1-2 posterior fusion was performed to treat the atlantoaxial subluxation...

..This study was carried out to determine the optimal dosage of palonosetron in combination with dexamethasone in patients in Japan...

..However, magnetic resonance imaging and surgical findings were consistent with chronic subdural hematoma (CSDH). The preexisting neurological disease may have allowed such unexpected CSDH expansion...

..Furthermore, statistical analysis was performed to determine factors influencing the prognosis...