Table 2. Red flags and suggestive features in MOG-IgG myelitis.

Clinical red flags	Suggestive clinical manifestations
1. Residual severe paraplegia after a single myelitis attack	1. Good motor recovery
2. Rapid severe deficit (≤4 h to nadir deficit)	2. Predominant residual sphincter dysfunction
3. Slowly progressive myelopathy in the absence of an attack
Radiological red flags	Suggestive radiological findings
1. Cord atrophy after a single attack	1. Conus involvement
2. Presence of “brighter spotty lesion”	2. Central cord preference and formation of the H-sign
3. Persistent enhancement	3. Complete lesion resolution at follow-up

MOG-IgG, myelin oligodendrocyte glycoprotein antibodies.