PTPRC and neoplasm: To understand how RT affects tumor infiltrating lymphocytes (TILs), we measured the MHC-1 molecule expression on non-leukocytes (CD45−) and leukocytes (CD45+), and found a significantly increased level of MHC-1 expression on both non-leukocytes and leukocytes following radiation, compared with the unirradiated control tumors (Supplementary Fig. 2a–c).