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Head CT showing periventricular white matter lesions. Leukoaraiosis is a particular abnormal change in appearance of white matter near the lateral ventricles. It is often seen in aged individuals, but sometimes in young adults. [1] [2] On MRI, leukoaraiosis changes appear as white matter hyperintensities (WMHs) in T2 FLAIR images.
The presence of incidental MRI findings in the CNS white matter: Ovoid and well-circumscribed homogeneous foci, with or without involvement of the corpus callosum; T2 hyperintensities larger than 3 mm in diameter, which fulfill at least 3 of the 4 Barkhof MRI criteria [7] for DIS; The CNS abnormalities are not consistent with a vascular condition
These small regions of high intensity are observed on T2 weighted MRI images (typically created using 3D FLAIR) within cerebral white matter (white matter lesions, white matter hyperintensities or WMH) [1] [2] or subcortical gray matter (gray matter hyperintensities or GMH). The volume and frequency is strongly associated with increasing age. [2]
Multiple sclerosis with cavitary lesions: Atypical multiple sclerosis cases similar to vanishing white matter disease but etiologically different from both. [77] Lesions similar to vanishing white matter disease [77] Leukodystrophy-like MS. Other radiological classification of atypical lesions proposes the following four subtypes: [78] infiltrative
“White matter hyperintensities specifically refer to lesions found in the white matter tracts of the brain, i.e., the cables connecting neurons, and are an imaging biomarker for diseases ...
The name multiple sclerosis refers to the scars (sclerae – better known as plaques or lesions) that form in the nervous system. These lesions most commonly affect the white matter in the optic nerve, brain stem, basal ganglia, and spinal cord, or white matter tracts close to the lateral ventricles. [1]
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