Clinical and Radiological Outcomes in People With Aquaporin-4 IgG Positive Neuromyelitis Optica Spectrum Disorder Treated With Ravulizumab
This is an observational study to: * evaluate the on-treatment clinical performance of ravulizumab in relation to the pre-treatment time period (time period prior to exposure), * enhance knowledge regarding conventional MRI outcomes in people with NMOSD treated with ravulizumab, * identify factors suggestive of subclinical disease progression through conventional MRI sequences, * determine if treatment with ravulizumab, impacts longitudinal 3D conformational MRI measures at the dorsal medulla and other regions of the CNS, and * identify biomarkers (e.g., serum neurofilament light chain (sNfL), conventional and novel MRI markers, etc.) related to disease activity.
• Signed informed consent available prior to conduct of any study associated activities
• Men and women \> 18 years of age
• Aquaporin-4 IgG positive people with neuromyelitis optica spectrum disorder treated with commercially available ravulizumab in a manner consistent with the approved indication
• Expanded Disability Status Scale score of \<7.0