ITGAM and neoplasm: Comparison between PMN- and M-MDSC subsets, in this model, was however cumbersome being PMN-MDSC the population that expands mostly in the spleen of tumor-bearing mice, accounting for nearly 80% (77.8 ± 9.6) of the CD11b+ cells, in comparison to the M-MDSC that account for 1% (1.10 ± 0.3).