PTPRC and neoplasm: Moreover, qRT‒PCR showed reduced CD14 gene expression in LM (Fig. S5H), and flow cytometry similarly revealed lower CD14 intensity in CD45− tumor cells from LM compared with irradiated ectopic tumors (Fig. S5I), suggesting that LM may arise from CD14+ subpopulations of the primary tumor but display overall lower CD14 levels due to smaller tumor burden.