John K. Hope

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Meningeal tumors occurring in a pediatric hospital over a period of 18 years were studied. The incidence of meningeal sarcomas was much lower than has been previously reported. A histologic subtype of meningiomas was found which has not previously been described. In these "sclerosing" tumors only a small portion of the lesion contained viable cells, most of(More)
PURPOSE To assess the accuracy of three-dimensional CT angiography (CTA) in the detection and characterization of intracranial aneurysms and to help determine its role as a screening test for aneurysms in the asymptomatic population and as an adjunct to angiography in subarachnoid hemorrhages and in the follow-up of untreated aneurysms. METHODS In a(More)
Racial differences in the incidence and rate of rupture of intracranial aneurysms are well recognized. A retrospective study of racial differences between Maori and European New Zealanders presenting to the Auckland Regional Neurosurgical Unit between 1985 and 1990 was conducted. It was found that the incidence per 100,000 of the population for all(More)
PURPOSE To identify the radiologic features that might help in preoperative differentiation of the meningiomas from the remaining primary meningeal tumors, in particular the malignant tumors. METHODS The clinical and computed tomographic features of 21 children with histologically proved primary meningeal tumors were analyzed. FINDINGS Benign tumors(More)
BACKGROUND AND PURPOSE Coil embolization of berry aneurysms is a relatively new treatment whose long-term efficacy has yet to be established. The purpose of this study was, first, to attempt to identify factors that might be important in predicting success both at the time of treatment and at the time of follow-up angiography, and, second, to study changes(More)
Bilateral frontal and parietal opercular lesions cause a syndrome characterized by paralysis of the masticatory, facial, pharyngeal, and tongue muscles (the anterior opercular syndrome). The anterior opercular syndrome can occur in patients with herpes simplex encephalitis (HSE), but in most of these patients the diagnosis of HSE was not confirmed. We(More)
PURPOSE To compare the efficacy and biocompatability of electrolytic and mechanically detachable embolization coils of two metal types. METHODS Experimental saccular aneurysms in pigs were used to assess embolization induced by platinum or tungsten coils. Longitudinal angiographic and histologic studies were performed on treated and untreated (control)(More)
OBJECTIVE To describe the clinical and radiologic features of superficial siderosis of the CNS after treatment of a cerebellar tumor. METHODS Clinical assessment and MRI in four patients with superficial siderosis were performed. RESULTS Four patients with superficial siderosis had been treated for a primary cerebellar tumor (astrocytoma in three(More)
The neuropathologic and pathophysiological relationship of specific to more generalized cognitive dysfunction in Parkinson's disease (PD) remains incompletely understood. This issue was examined in a study of 39 patients with PD, utilizing standardized clinical measures, computerized neuropsychological tests, and quantitative computed tomography. Disorders(More)
OBJECTIVE To determine the prevalence of syringomyelia in a defined population in New Zealand and measure the prevalence of syringomyelia in the three main ethnic groups (Maori, Pacific people and Caucasians/others) living in this region. METHODS A retrospective study of all confirmed cases of syringomyelia diagnosed in residents of northern New Zealand(More)