Legend Axial T2 and FLAIR images show focal signal hyperintensity involving the left thalamus, periventricular white matter, and external capsule. Notice the lack of significant mass effect.

Legend Axial FLAIR image (top left) shows involvement of the insular cortex and posterior limb of the internal capsule. Axial and Coronal T1 Gadolinium enhanced images (center and top right) show no abnormal enhancement.

Legend Single Voxel MR Spectroscopy was obtained at the level of the lesion (voxel 1), and contralateral white matter (voxel 2). The contralateral normal white matter shows a normal spectrum. The spectrum obtained from the lesion shows slight elevation of the Choline peak (relative to the adjacent Creatine peak), suggesting cell membrane turnover. Myo-inositol at 3.56 is also mildly elevated, suggesting some gliosis. Key words: mri mrs tumor neoplasia

Brain Diagnosis: Low-grade glioma