CD4 and myeloid sarcoma: A large number of studies have demonstrated that CD4 + T cells play an important role in the pathogenesis of MS; helper T cell 1 (Th1) and Th17 cells are involved in the pathogenesis of MS, and regulatory T cells (Tregs) are involved in the pathogenesis of MS in experimental autoimmune encephalomyelitis (EAE) models (Chitnis, 2007; Basak and Majsterek, 2021).