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The increased pressure causes a rupture of the cranial dura mater, leading to a CSF leak and intracranial hypotension. [46] [47] Patients with a nude nerve root, where the root sleeve is absent, are at increased risk for developing recurrent CSF leaks. [48] Lumbar disc herniation has been reported to cause CSF leaks in at least one case. [49]
Management of cranial venous outflow obstruction involves treating the underlying cause, if identifiable, and managing the symptoms. This can include medication to reduce intracranial pressure, anticoagulation therapy to prevent thrombosis, and in some cases, surgical intervention to restore normal venous drainage. [6] [11]
Moyamoya disease is a disease in which certain arteries in the brain are constricted. Blood flow is blocked by constriction and blood clots (). [2]A collateral circulation develops around the blocked vessels to compensate for the blockage, but the collateral vessels are small, weak, and prone to bleeding, aneurysm and thrombosis.
Aqueductal stenosis is a narrowing of the aqueduct of Sylvius which blocks the flow of cerebrospinal fluid (CSF) in the ventricular system. Blockage of the aqueduct can lead to hydrocephalus , specifically as a common cause of congenital and/or obstructive hydrocephalus.
Active blood flow is indicated by the presence of flow voids. A rich vascularity gives the lesions a brilliant enhancing quality. Recent researches have shown that choroid plexus papilloma and choroid plexus cancer may be distinguished from one another using arterial spin labeling.
The treatment of cerebral edema depends on the cause and includes monitoring of the person's airway and intracranial pressure, proper positioning, controlled hyperventilation, medications, fluid management, steroids. [3] [7] [8] Extensive cerebral edema can also be treated surgically with a decompressive craniectomy. [7]
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Vertebrobasilar insufficiency (VBI) describes a temporary set of symptoms due to decreased blood flow in the posterior circulation of the brain.The posterior circulation supplies the medulla, pons, midbrain, cerebellum and (in 70-80% of people) supplies the posterior cerebellar artery to the thalamus and occipital cortex. [1]