Using flow cytometry on tumors disaggregated 3 h after intratumoral injection of Cy5-PIC, we found Cy5-PIC was endocytosed and retained by tumor cells, DCs (CD11c+MHCII+CD45+), and macrophages (CD11b+F4/80+CD45+) (Fig. 3a and Supplementary Fig. 13). Here, PTPRC is linked to neoplasm.