PMC6284006_01
Enlargement and hyperintensity of the optic nerve in fat-suppression MRI techniques (Short-tau inversion recovery or STIR sequence on the left and spectral presaturation with inversion recovery or SPIR sequence on the right). Fat-suppression sequences are useful to identify signal abnormalities of structures surrounded by fatty tissues, such as the optic nerve.
fneur-09-01031-g0001.jpg
PMC6284006_01_fneur-09-01031-g0001.jpg
F1
Brain and spinal cord Magnetic Resonance Imaging (MRI) demonstrated enlargement and hyperintensity of the left optic nerve in its posterior portion, with intense enhancement after the administration of gadolinium (Figure 1).
Pattern shift visual evoked potentials showed a marked delay of the P100 component at 15' (upper) and at 60' (lower) in the left eye (P100 latency at 15': 111 ms in the left eye, 98 ms in the right eye; P100 latency at 60': 114 ms in the left eye, 97 ms in the right eye).
fneur-09-01031-g0002.jpg
PMC6284006_01_fneur-09-01031-g0002.jpg
F2
Pattern shift visual evoked potentials showed a marked delay of the P100 component with an attenuation of the P100 wave amplitude in the left eye (Figure 2).