Single episode optic neuritis/relapsing optic neuritis
3
1
0
0
0
0
Single episode transverse myelitis/relapsing transverse myelitis
7
2
0
9
1
8
Brain lesions typical of NMOSD
6
3
1
8
4
5
Other IIDDs
ADEM
0
26
1
25
8
18
Single episode optic neuritis (undeclared as NMO or MS, no brain/cord lesions)
0
7
0
7
0
0
Single episode transverse myelitis undeclared as NMO/MS
0
20
0
10
8
12
Unclassified single episode demyelinating disease of the brain (undifferentiated from NMOSD/ADEM/MS/non-IDDS)
0
8
0
8
0
0
Unclassified relapsing optic neuritis (MRI of brain and spine negative for MS or NMO/NMOSD)
0
3
0
3
0
0
MS: multiple sclerosis; NMO: neuromyelitis optica; NMOSD: neuromyelitis optica spectrum disorder; VS: vertebral segments.
*Six patients initially diagnosed with opticospinal variants of Multiple sclerosis upon reviewing first MRI at onset of disease were found to have longitudinally extensive cord lesions.
**Eight patients reclassified as NMO.
#Reclassified as NMOSD.