However, conflicting results have been obtained in cellular, molecular and neuropathological studies since, in MS patients, blood EBV-specific CD8+ T cell response was found increased, decreased or absent; cerebrospinal fluid (CSF) and blood EBV DNA load was high or not measurable; and the detection of EBV-infected B cells in brain lesions was inconsistent [3,5,7,12]. Here, CD8A is linked to myeloid sarcoma.