AJNR. American journal of neuroradiology
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AJNR Am J Neuroradiol · Sep 2005
Review Case ReportsArteriovenous fistulas at the cervicomedullary junction presenting with subarachnoid hemorrhage: six case reports with special reference to the angiographic pattern of venous drainage.
Cases with spinal perimedullary arteriovenous fistulas (SPAVFs) or spinal dural arteriovenous fistulas (SDAVFs) at the cervicomedullary junction are rare. We performed a retrospective, angiographic study of 6 such patients to assess whether available angiographic data were predictive of the risk for hemorrhage. ⋯ SPAVFs and SDAVFs at the cervicomedullary junction that manifest an ascending venous route into the intracranial sinus present an increased risk for SAH.
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AJNR Am J Neuroradiol · Sep 2005
Review Case ReportsBacillus cereus meningoencephalitis in preterm infants: neuroimaging characteristics.
Meningoencephalitis can severely damage the developing brain. Preterms are more prone for nosocomial infections with pathogens other than Group B streptococci and Escherichia coli. In this report we focus on the deleterious clinical course and imaging characteristics of proven Bacillus cereus meningoencephalitis. ⋯ Knowledge of this paradigm of acquired brain injury may help to better understand the natural course of these severe neonatal infections.
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AJNR Am J Neuroradiol · Sep 2005
Clinical TrialTreatment and follow-up of 22 unruptured wide-necked intracranial aneurysms of the internal carotid artery with Onyx HD 500.
The purpose of this study was to demonstrate endovascular treatment of wide-necked aneurysms of the internal carotid artery with the liquid embolic agent Onyx HD 500. ⋯ The endovascular treatment of wide-necked, large or giant ICA aneurysms with Onyx HD 500 is a treatment option in these selected cases. The benefit is a primary high and stable occlusion rate and good clinical outcome. ICA occlusion caused by Onyx migration in the parent artery is a typical problem, with a benign clinical course in this series.
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An acute intracranial embolus may be associated with a hyperdense artery sign on CT, related to acute thrombus within the affected artery, a phenomenon that is well known and has been extensively documented. We present an unusual case of a middle cerebral artery territory acute infarct with a hypodense artery on CT. The Hounsfield unit attenuation of the embolic lesion was fat density. CT angiography and MR imaging confirmed the fatty lesion to be within the middle cerebral artery.
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AJNR Am J Neuroradiol · Sep 2005
Case ReportsSemilobar holoprosencephaly seen with diffusion tensor imaging and fiber tracking.
A neonate with semilobar holoprosencephaly was studied with diffusion tensor imaging and fiber tracking. Fiber tracking showed that the frontooccipital fasciculi were in continuity across the ventral midline, interposed between fused caudate and dysplastic fornices. ⋯ There was a posterior commissural white matter bundle representing a callosal splenium. Diffusion tensor imaging and fiber tracking revealed white matter structures not apparent on routine imaging sequences, which are in agreement with pathologic descriptions of the holoprosencephalic brain.