Given that Treg cells play a vital protective role in the regulation of MS/EAE severity and progressive disease course (Buc, 2013; Furtado et al., 2001; Kleinewietfeld & Hafler, 2014; Randolph & Fathman, 2006), we compared the distributions of pan‐ and MOG‐specific (sp). Here, MOG is linked to myeloid sarcoma.