World Neurosurg
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The development of venous outflow stenosis in cerebral arteriovenous malformation (AVM) is poorly understood. The location of stenosis within the AVM draining vein in relation to the adjacent venous sinus and the hypothesis that the ratio of draining vein to adjacent sinus diameter might predict the development of venous stenosis were explored. ⋯ AVM venous outflow stenosis is observed close to the adjacent venous sinus junction. The degree of venous stenosis is greater when the ratio of AVM draining vein/adjacent venous sinus diameter is >0.5. This may be related to more turbulent flow at the junction of the draining vein and venous sinus, especially in larger draining veins, which causes venous stenosis to develop over time.
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Chiari I malformation (CMI) and the topics concerning it have been the subject of numerous discussions and polarizing controversies over the course of the last 20 years. ⋯ Sixty three recognized international CMI experts from 4 continents, with a collective surgical experience of >15,000 CMI cases were polled about a number of CMI topics. The results showed a high level of consensus, as well as a paradigm shift.
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Solitary fibrous tumor/hemangiopericytoma (SFT/HPC) and meningioma exhibit similar radiographic features; however, they differ in their prognoses. Preoperative differentiation between them is important for determining the treatment and follow-up plan. The aim of this study was to determine the factors that can be used to differentiate SFT/HPC from meningioma and World Health Organization (WHO) grade I from grade II meningioma. ⋯ Age and myo-inositol level calculated from MRS are useful factors for distinguishing SFT/HPC from meningioma preoperatively.
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Patients with a renal transplant are an ever-increasing demographic. Their life expectancy is also on the rise and thus malignancies or tumors in these cases are more frequent. These patients are often on immunosuppressive drugs that are known to cause changes in the microvasculature, especially of the deep white matter. However, benign dural-based lesions are a rarity in these cases with very few (<5) ever being reported. Imaging findings in such cases are altered, which leads to an altered set of differential diagnosis. ⋯ Renal transplants and long-term survival are now a reality; calcineurin inhibitors are a staple for these cases. The drugs alter imaging findings and hence cases need to be carefully evaluated with a host of differential diagnosis. Knowledge of these changes is now necessary for these new spectra of cases.
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Most Americans consult the Internet to address their health concerns. Limited health literacy among the public highlights the need for patient education Web sites to deliver understandable health information. We assessed the understandability and actionability of online neurosurgical patient education materials (PEMs) provided by the American Association of Neurological Surgeons (AANS) and MedlinePlus. ⋯ Neurosurgical online PEMs may be difficult to understand and potentially act as barriers for patients' engagement with health systems. There is a need to deliver patient-centered health information that effectively informs patients, aiding in meaningful health decision making.