(Figure 2C and 2D: S100A9+ MDSCs vs. S100A9+ cells in tumor tissue, Spearman r = 0.54, p = 0.004, n = 27; S100A9+ MDSCs vs. CD68+ cells, r = 0.43, p = 0.03, n = 24). Here, CD68 is linked to neoplasm.