MOG and myeloid sarcoma: The main suspect is butyrophilin protein, which is structurally similar and induces antibody cross-reactivity to the myelin oligodendrocyte glycoprotein (MOG)20,21 and has been shown to stimulate T-cell responses to MOG and induce CNS inflammation in an animal model.22 The results of these experimental immunological studies are in line with early epidemiological data showing a high correlation between cow's milk consumption and MS prevalence.23,24