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Diffusion-weighted magnetic resonance imaging in the assessment of choroid plexus aging.
Neuroradiology Journal 2017 October
Recent studies have pointed out dysfunction and histopathological changes of the choroid plexuses (CPs) with aging. This paper reviews apparent diffusion coefficient (ADC) values of the CPs for age-related changes. All the brain MR images of the patients between January 2013 and June 2014 in our Radiology Department were retrospectively investigated. Patients with major cranial abnormalities (brain tumors, hyperacute or acute ischemia, developmental anomalies, hemorrhage, hydrocephaly) were excluded. Diffusion-weighted images were obtained at the parameter values of b = 1000 s/mm2 in the axial plane. The transverse diameters of the lateral ventricles (LVs) and ADC values of both CPs were measured. Brain MRIs of 202 individuals, 97 men (48%), 105 women (52%), were studied. There were statistically significant positive correlations between the ADC values of CP and patient ages. (Right CP: r = 0.623; p < 0.05. Left CP: r = 0.654; p < 0.05). There were positive correlations between LV diameters and age ( r = 0.624, p < 0.05 for the right LV; r = 0.621, p < 0.05 for the left LV). The ADC values of age groups significantly differed ( p < 0.05); the ≥61-year-old group was significantly higher compared to younger individuals. There is a progressive increase of water diffusivity in the CPs during aging. ADC values should be considered as a neuroimaging quantitative biomarker in normal aging-dementia syndromes.
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