Figure 4.

Post contrast sagittal T1 (A) and axial T1 (B) of the lumbar spine, post contrast axial T1 of the brain (C,D): 14-year-old girl with numbness/tingling, paresthesia and bilateral lower extremity weakness. Patient also has bilateral facial weakness. There is diffuse mild thickening of the cauda equina nerve fibers with enhancement (arrows). Additionally, exiting nerve roots of the cervical and thoracic region also show enhancement. Enhancement of bilateral facial (dashed arrows) and trigeminal nerves is also visualized (curved arrows). Features are in keeping with Guillain-Barre syndrome (acute inflammatory demyelinating polyneuropathy). With involvement of facial and trigeminal nerves, Miller Fisher variant should be considered.