MOG and myeloid sarcoma: Thirteen MOG-IgG-positive children (MOGADped, female:male 8:5, mean age at ON 10.7 ± 4.2 years, 21 ON eyes) and 21 MS children (MSped, female: male 19:2, mean age at ON 14.3 ± 2.4 years, 24 ON eyes) with a single unilateral or bilateral ON episode in their history were included into analysis.