CD8A and myeloid sarcoma: Accordingly, in CSF from a PP-MS cohort, a positive correlation between CD8+CD20+ and WM lesion volume (p = 0.0092; rs = 0.43; not for CD4+CD20+, p = 0.27; rs = 0.19) and a negative correlation between NAWM and thalamus volume with CD8+CD20+ (p = 0.021, rs = −0.39; p = 0.0058; rs = −0.46, respectively) and CD4+CD8+ (p = 0.044; rs = −0.34; p = 0.0041, rs = −0.48, respectively) cells were described; no correlations were observed with cortical GM volume, magnetization transfer in WM lesions, or fractional anisotropy in NAWM [32].