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FIG 1. Patient 14. Secondary progressive MS. Axial contrast-enhanced T1-weighted MR image (600/27/1 [TR/TE/excitation]).
A, No enhanced lesion can be seen on image 6 months prior to follow-up.
B, A new, nodular, enhanced MS lesion appears 6 months later.
C, After 6 months, the pattern of nodular enhancement converts to a ringlike pattern.
D, After another 6 months, the ringlike, enhanced lesion cannot be seen.
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