Fig. 2.

Patient's MRI features. The T1-weighted (T1WI) images with gadolinium enhancement by Gadobutrol reveal bilateral enhancement of the optic nerve sheaths and notable enhancement within the intracranial segments of the bilateral optic nerves (a); Coronal T2-weighted images (T2WI) display pronounced T2 hyperintensity in the orbital segments of both optic nerves (d); Multiple patchy T2-hyperintense lesions across the bilateral periventricular areas, basal ganglia, pons, and subcortical white matter (b, e); Longitudinally extensive myelitis lesions spanning the cervical spinal cord from C1 to C5 (c) with central located (f).