fig1

Figure 1. (a) Fluid-attenuated inversion recovery (FLAIR) axial image showing hyperintense lesion along the frontal subcortical white matter with callosal and forniceal involvement (arrow); (b and c) typical open rim pattern of enhancement on axial and saggital gadolinium T1-weighted images; (d) perfusion imaging indicating low perfusion; (e) magnetic resonance spectroscopy over intermediate zone that demonstrates choline peak with reduction in N-acetyl aspartate; (f) immediate postbiopsy FLAIR image after pulse steroid therapy demonstrating reduction in edema and mass-effect