Our results showed that in inactive MS lesions, higher numbers of total T cells (CD3-positive), cytotoxic T cells (CD8-positive), and KiM1P-positive macrophages were associated with older age (CD3-positive T cells: r = 0.7, p = 0.04; CD8-positive cytotoxic T cells: r = 0.8, p = 0.03 and KiM1P-positive macrophages: r = 0.8, p = 0.03; Supplementary Table 5). Here, CD8A is linked to myeloid sarcoma.