MRC1 and neoplasm: A multicolor flow cytometry assay was used to identify and assess the frequency of tumor-infiltrating (TILs) immune cells (e.g., CD3 [T cells], CD8 [T cells], CD4 [helper T cells], CD11b [dendritic cells], CD206 and I-A/I-E [F4/80 macrophages], CD335 [NK cells]).