Neuroimaging clinics of North America
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Neuroimaging Clin. N. Am. · Nov 1997
ReviewClinical evaluation and management of aneurysmal subarachnoid hemorrhage.
As neuroradiologic techniques become more critical to the care of patients suffering from aneurysmal subarachnoid hemorrhage, a thorough understanding of the natural history and medical management of this disorder by neuroradiologists is required to insure appropriate diagnosis and therapy. This article addresses the medical and perioperative management of subarachnoid hemorrhage, with an emphasis on features relevant to neuroradiologic diagnosis and treatment.
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An estimated 1% to 5% of adults have a cerebral aneurysm. Each year, approximately 1 in 10,000 North Americans suffer an aneurysmal subarachnoid hemorrhage, with greater than 50% combined morbidity and mortality. Cerebral aneurysm formation and rupture is associated with a variety of factors, including increasing age, female gender, hypertension, alcohol, smoking, and genetic factors.
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The visual pathways and the ocular motor cranial nerves are frequently injured by expanding cerebral aneurysms. Neuro-ophthalmologic signs and symptoms may be the only indications of an aneurysm prior to rupture. ⋯ Acute or chronic visual loss may herald an aneurysm in the carotidophthalmic, supra clinoid carotid, internal carotid bifurcation, or anterior communicating artery distributions. Diplopia and retro-orbital pain may be warning signs that precede the discovery of a posterior communicating, basilar, or cavernous sinus aneurysm.
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Neuroimaging Clin. N. Am. · May 1997
ReviewNeuroimaging of AIDS. I. Central nervous system toxoplasmosis.
Toxoplasmosis is the most common cerebral mass lesion encountered in HIV-positive patients. Previously uncommon, this disease has increased markedly since the AIDS epidemic. There are occasionally unusual appearances of central nervous system toxoplasmosis that make diagnosis by standard imaging techniques difficult or impossible. More recently, MR spectroscopy has increased the ability to differentiate between various central nervous system lesions.
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Neuroimaging Clin. N. Am. · May 1997
ReviewNeuroimaging of central nervous system tuberculosis in HIV-infected patients.
The recent resurgence of tuberculosis in the United States is in part attributable to the AIDS epidemic. Central nervous system tuberculosis has fairly specific radiographic features, and thus the alert radiologist may be the first to suggest this diagnosis. This article reviews the neuroimaging characteristics of central nervous system tuberculosis in HIV-seropositive patients, including intracranial manifestations, tuberculous spondylitis, and tuberculous arachnoiditis.