MOG and multiple sclerosis: In addition, other forms of ACA have to be taken into account, including, among others, multiple sclerosis, MOG-IgG-related autoimmunity, (very rarely) neuromyelitis optica, rheumatic disorders and vasculitis, Behçet disease, ADEM and post-infectious cerebellitis with presumed T cell-mediated pathogenesis, and sarcoidosis.