Most (33 of 35 with available data; 94%) of the patients had an acute or subacute myelitis onset to nadir (6 hours–21 days) and were paraparetic or quadriparetic with at least antigravity strength (n = 29/39, 74%), without differences between AQP4-IgG seropositive NMOSD, MOGAD, or “double-seronegative” groups (Table 2, eTable 3). The gene discussed is AQP4; the disease is myelitis.