Evaluate for other causes of symptoms (e.g. HSV, bacterial meningitis, Guillain-Barre syndrome)
CSF: Pleocytosis (WBC count >5 cells/mm3), +/- elevated protein
MRI: spinal cord lesion, largely restricted to gray matter, spanning one or more spinal segments
Spinal cord lesions may not be present on initial MRI if performed within the first 72 hours of onset of<unk>  limb weakness.
Spinal cord lesions may not be present on initial MRI if performed within the first 72 hours of onset of<unk>  limb weakness.
Acute flaccid myelitis
Neuromuscular weakness
Transverse myelitis
Upper motor neuron:
Amyotrophic lateral sclerosis
CVA
Lateral medullary syndrome
Hemorrhagic stroke