No significant differences in NKG2C expression were perceived between controls and progressive forms; yet, lower proportions of NKG2C(+) NK cells in PPMS as compared to SPMS were detected, in line with the lower NKG2C pattern of expression in MS patients observed in the multidimensional analysis as well as in previous studies with a larger number of cases (31). Here, KLRC2 is linked to myeloid sarcoma.