IFNB1 and myeloid sarcoma: Disease modifying drugs (DMDs) currently used for MS, such as recombinant interferon-beta (IFNb)-1a or -1b and glatiramer acetate (GA), have been mostly designed to target the activation and function of pathogenic auto-aggressive T cells in MS, but the effects on both monocyte or macrophage function have been clearly reported (21–23).