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Leukoaraiosis: an independent risk factor for stroke?Inzitari DStroke 2003[Aug]; 34 (8): 2067-71BACKGROUND: Leukoaraiosis, a term that defines an abnormal appearance of the subcortical white matter of the brain on neuroimaging (bilateral patchy or diffuse areas of low attenuation on CT or hyperintense T2 MR areas), has gained evidence in retrospective studies to demonstrate its association with stroke and in prospective studies to demonstrate its prognostic value related to the occurrence of stroke, both ischemic and hemorrhagic, or the occurrence of vascular death. SUMMARY OF REVIEW: The subtype of ischemic stroke most strongly predicted by leukoaraiosis is lacunar infarct, which is likely caused by the same underlying small-vessel pathology. Leukoaraiosis has been shown to predispose to intracerebral hemorrhage at both the basal-ganglionic and lobar sites, primarily when leukoaraiosis is extensive and patients are treated with anticoagulants because of prior ischemic events. CONCLUSIONS: Leukoaraiosis shares with stroke common pathophysiological mechanisms and, because it is likely an expression of the same disease, must be regarded as an intermediate surrogate of stroke rather than a true stroke risk factor.|Brain Infarction/etiology[MESH]|Brain/blood supply/diagnostic imaging/pathology[MESH]|Cerebral Hemorrhage/etiology[MESH]|Cerebrovascular Disorders/*complications/diagnosis[MESH]|Humans[MESH]|Magnetic Resonance Imaging[MESH]|Microcirculation/diagnostic imaging/pathology[MESH]|Predictive Value of Tests[MESH]|Risk Factors[MESH]|Stroke/*etiology[MESH]|Tomography, X-Ray Computed[MESH] |
