PTPRC and neoplasm: Monocytes with low Ly6c expression (CD45+CD11b+Ly6G−Ly6clow), monocytes with high Ly6c expression (CD45+CD11b+Ly6G−Ly6chigh), neutrophils (CD45+CD11b+Ly6G+Ly6c+) and lymphocytes (CD45+CD11b−) in the tumor tissue were compared with the corresponding population isolated from the spleen of naïve animals (n = 4).