FIG 1. MR imaging findings and MR spectroscopic findings for patient 1.

A, Fluid-attenuated inversion recovery MR image (9000/110 [TR/TE]; inversion time, 2500 ms) of an 8-year-old male patient, obtained through the level of the centrum semiovale in the axial plane. Hyperintense areas (arrowhead) can be seen in the central white matter of the bilateral parietal cortex.

B, Proton MR spectroscopy sampled at the left parietal cortex and central white matter of the same patient. A duplex peak resulting from lactate can be seen at approximately 1.3 ppm (arrow), and active demyelination was suspected.