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Frequency of each aquaporin‐4 immunoreactivity pattern in demyelinating lesions from cases with neuromyelitis optica (NMO) or NMO spectrum disorders. Abbreviations: NMO = neuromyelitis optica; NMOSD = neuromyelitis optica spectrum disorder.
| Lesion pattern | NMO and NMOSD (n = 149) | ||
|---|---|---|---|
| Active (n = 42) | Chronic active (n = 72) | Chronic inactive (n = 35) | |
| Pattern A | 17 | 13 | 0 |
| Pattern B | 10 | 12 | 0 |
| Pattern C | 0 | 11 | 9 |
| Pattern D | 9 | 36 | 23 |
| Pattern N | 6 | 0 | 3 |
