Treatment response in children with relapsing MOG-antibody associated disease

Data regarding treatment in pediatric relapsing MOGAD are limited.

To evaluate response of intravenous immunoglobulin (IVIG) compared to other therapies in relapsing pediatric MOGAD.

In this retrospective multicenter study, children with MOGAD were recruited from different medical centers. Inclusion criteria encompassed: age <18 years, MOGAD diagnosis, relapsing disease course, >6 months of maintenance treatment and >12 months follow-up.

Seventy children with relapsing MOGAD were stratified into two groups. The first group received IVIG alone (n = 23), IVIG preceded by (n = 16) or in combination with other immunomodulating therapies (IMT) (n = 7). The second group received mycophenolate mofetil, azathioprine, rituximab, or other IMTs (n = 24). 13 % (6/46) of patients with IVIG relapsed in the first year, compared to 33 % (8/24) in the IMT group (relative risk 0.70, 95 % CI 0.53 to 0.99, p = 0.061). Annual relapse rate (ARR) was decreased under therapy compared to pre-treatment in both groups (IVIG: p < 0.001; other IMTs: p = 0.006). ARR was lower in the IVIG group (p = 0.040) in addition to a reduced risk of an early relapse compared to the other IMT group (hazard ratio 0.36, 95 % CI 0.15 to 0.87, p = 0.023).

Our study supports monthly IVIG as maintenance therapy in children after the second MOGAD episode.