Figure 1.

T2W (A,B) and post-contrast T1W (C,D) axial MR images show tortuous and enlarged bilateral optic nerves with enlarged optic chiasma (arrows in B) demonstrating marked enhancement on post-contrast images. There is mid-orbit downward kinking of optic nerves (yellow arrows) and double-intensity tubular thickening (hyperintense and hypointense rim surrounding the optic nerve on T2- and T1-weighted images, respectively, represented by red arrows indicating the pseudo-cerebrospinal fluid or the double-intensity lumen sign).