ITGAM and colorectal carcinoma: CRC MDSCs comprise two distinct populations: lineage negative‐human leukocyte antigen‐DR isotype (Lin−HLA‐DR−)/low CD11b+CD14−CD15+CD33+ for PMN‐MDSCs and Lin−HLA‐DR−/low CD11b+CD14+CD15−CD33+ for monocytes [195].