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• W2485113445 abstract "Background X-linked dystonia-parkinsonism (XDP) is an inherited neurodegenerative adult-onset basal ganglia model disease associated with severe striatal atrophy. Anatomical changes exceeding striatal pathology were not yet described in XDP. The present study aimed to assess the microstructure of white matter tracts in XDP using magnetic resonance tomography. Methods Diffusion-weighted imaging was done in 10 XDP patients, aged 42.2 years (SD 8.1), and 14 ethnicity and age-matched controls, aged 40.2 years (SD 6.4). Based on diffusion tensor images, mean diffusivity (MD) and fractional anisotropy (FA) maps were calculated. Results Except for in the occipital lobe, XDP patients showed generally increased MD values across the entire white matter. FA map analysis identified four significant clusters with controls showing higher FA values than XDP patients. Involved regions included the fornix, anterior thalamic radiation, corticospinal tract, and superior corona radiata bilaterally. In the fornix and the anterior thalamic radiation, the UPDRSIII total score showed a negative correlation with mean FA values at a trend level (tau = −0.40, p = 0.053). Volumetric analysis revealed significant gray matter volume loss of putamen (F(1,19) = 44.2, p < 0.001), caudate nucleus (F(1,19) = 54.3, p < 0.001), and pallidum (F(1,19) = 8.9, p = 0.007). Conclusions The present study confirms striatal atrophy in XDP and provides evidence for a strong involvement of the white matter and the pallidum. This calls into question the previously held concept of exclusive striatal atrophy in this unique movement disorder. The spared occipital region may point towards a lack of anatomical connections with the atrophied striatum." @default.
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• W2485113445 date "2016-10-01" @default.
• W2485113445 modified "2023-10-02" @default.
• W2485113445 title "Neuroanatomical changes extend beyond striatal atrophy in X-linked dystonia parkinsonism" @default.
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• W2485113445 doi "https://doi.org/10.1016/j.parkreldis.2016.07.012" @default.
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