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. 2013 Mar 10;2013:415873. doi: 10.1155/2013/415873

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Copyright © 2013 Guglielmo Manenti et al.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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T2w FLAIR images (Philips Achieva 3T, TR = 9000 ms; TE = 123 ms; inversion time TI = 2500 ms; FA 180). Juxtaventricular peri- and paratrigonal white matter lesion underneath the frontal lobe of the left hemisphere (arrows) in a 44-year-old man with a 12-year history of MS and affected by natalizumab-related PML in the coronal (a), (b) and axial plan (c), (d). Lesion reduction between December 2011 (a), (c) and May 2012 (b), (d). A bilateral white matter periventricular lesion load related to MS is also seen (arrow heads).