PTPRC and neoplasm: In mEERL-hEGFR, MOC2-luc, and MOC1 tumors, the number of tumor-infiltrated PMN-MDSCs in CD45+ cells were significantly higher compared to MC38-luc tumor, while the number of tumor-infiltrated M-MDSCs was significantly higher in MC38-luc tumors compared to other tumors (Figure 2(a)).