The female-to-male ratio (5.1:1 vs 2.3:1 vs 3.3:1) and the mean age of the time of MRI scans at disease onset (36.5 ± 12.1 vs 31.0 ± 9.4 vs 26.7 ± 12.1 years) were higher in NMOSD patients than those in MS or MOG-EM patients, respectively. Here, MOG is linked to myeloid sarcoma.