ITGAM and chronic myelogenous leukemia, BCR-ABL1 positive: Despite the low percentage of IMCs identified as CD11b+CD33+CD14-HLADR-CD34+ cells, CML Gr-MDSCs are more immature cells compared to autologous PMNs, and showed lower levels of expression of CD11b, CD15, and CD16, and lower Arg1 expression and activity (6).