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Case 5: 12-year-old boy with seizure.
A, Axial T1-weighted localizer image (fast low-angle shot, 80/10) shows extensive hypointense infiltration of the right hemisphere with little mass effect.
B, Corresponding spectrum (CSI, PRESS, 1500/135, voxel size = 7.5 × 7.5 × 15 mm) shows a marked increase in Cho/Cr and Cho/NAA and a pronounced decrease in NAA/Cr. Moreover, there is a lactate doublet at 1.35 ppm.
