fig 3.

Case 8: 55-year-old man with diffuse involvement of both hemispheres.

A, Axial T2-weighted spin-echo localizer image (1900/80).

B, Corresponding spectrum. Stereotactic biopsy sample was taken from the denoted voxel, with a maximum Cho/NAA ratio of the lesion of 8.9 as well as a lactate doublet at 1.35 ppm. Histopathologic examination revealed a grade IV tumor. In other areas of the tumor there were lipid signals at 0.8 to 1.3 ppm (CSI, PRESS, 1500/135, voxel size = 7.5 × 7.5 × 15 mm).

fig 4. Case 1: 10-year-old boy with seizure. Axial spin-echo T2-weighted image (1900/80) shows extensive hyperintensity of the left occipital, parietal, and temporal lobes, with infiltration of the thalamus and the insula. Both gray and white matter are affected, and there is little mass effect