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![A clinically isolated syndrome: butterfly glioma mimic](https://image.oaes.cc/7965b912-26c4-4224-a7f8-997c32cace54/1116.fig.1.png)
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