FIG 2. MR images obtained in patient 2.

A, T2-weighted coronal image shows both increased (left) and decreased (right) signal in the optic tracks (arrows).

B, Contrast-enhanced T1-weighted image shows enhancement of the left optic nerve and low signal intensity in the right optic nerve (arrows).

C and D, Contrast-enhanced T1-weighted images show enhancement of the right optic tract (arrow in C) and chiasm (arrowhead in D).