CD163 and chronic myelogenous leukemia, BCR-ABL1 positive: Significant differences in CD163-positive macrophage frequencies were found between PMF (mean 28% CD163-positive cells) and CML (mean 1% CD163-positive cells) (p = 0.017, FDR = 0.025), PMF and ET (mean 7% CD163-positive cells) (p < 0.001, FDR = 0.005), PMF and PV (mean 8% CD163-positive cells) (p < 0.001, FDR = 0.013), and PMF compared with reactive BM (mean 2% CD163-positive cells) (p < 0.001, FDR = 0.010) (Fig. 2b).