Search results
Results from the WOW.Com Content Network
Most patients are seronegative for NMO-IgG and GFAP, biomarkers for neuromyelitis optica. [3] ANA, indicative of autoimmune optic neuropathy , is also generally negative. [ 3 ] CSF can also be evaluated for oligoclonal bands typical of multiple sclerosis, which will not be present in CRION. [ 1 ]
Neuromyelitis optica (NMO) is a particular disease within the NMOSD spectrum. It is characterised by optic neuritis and longitudinally extensive myelitis. In more than 80% of NMO cases, the cause is immunoglobulin G autoantibodies to aquaporin 4 ( anti-AQP4 ), the most abundant water channel protein in the central nervous system.
Anti-AQP4 diseases, are a group of diseases characterized by auto-antibodies against aquaporin 4.. After the discovery of anti-AQP4 autoantibody in neuromyelitis optica, it was found that it was also present in some patients with other clinically defined diseases, including multiple sclerosis variants like optic-spinal MS.
After the discovery of anti-AQP4 auto-antibodies there are two kinds of Optic-Spinal MS (OSMS): Anti-AQP4 positive OSMS or Neuromyelitis optica; Anti-AQP4 negative OSMS, currently idiopathic, considered inside the Inflammatory demyelinating diseases of the central nervous system spectrum.
This last requirement makes MS an ill-defined entity, whose borders change every time that a new disease is set apart. Some cases previously considered MS are now considered distinct conditions, like Neuromyelitis optica or antiMOG associated encephalomyelitis. Because of the requirement of distributed lesions, a single lesion (RIS) is not ...
This disease is considered one of the borderline forms of multiple sclerosis because some authors consider them different diseases and others MS variants. Other diseases in this group are neuromyelitis optica (NMO), Balo concentric sclerosis and Marburg multiple sclerosis. [4]
The most common cause is multiple sclerosis (MS) or ischemic optic neuropathy due to thrombosis or embolism of the vessel that supplies the optic nerve. [13] [14] Up to 50% of patients with MS will develop an episode of optic neuritis, and 20–30% of the time optic neuritis is the presenting sign of MS.
Anti-MOG antibodies have been described in some patients with NMOSD [15] [16] who were negative for the aquaporin 4 (AQP-4) antibody. However, most NMOSD is an astrocytopathy, specifically an AQP4 antibody-associated disease, whereas MOG antibody-associated disease is an oligodendrocytopathy, suggesting that these are two separate pathologic entities. [2]