PTPRC and neoplasm: The proportion of CD45 + immune cells was similar in all tumour sample types (Figs. 5E and 66cl4: 45.39%; 4T1-primary: 52.52%; 4T1-liver: 49.84%), with macrophages representing the dominant immune cell type (Fig. 5E-F: 66cl4: 39.35%; 4T1-primary: 40%; 4T1-liver: 38.59%) in line with previously published reports [61].