We then continued to analyze the expression differences of the five genes at the single-cell level, and Figure 11C demonstrates the immune cell and tumor cell occupancy of the 10 selected LUAD sequencing samples, with PTTG1 showing widespread expression in macrophages and T cells, while the other genes were highly expressed in only some macrophages (Figure 11D). This evidence concerns the gene PTTG1 and neoplasm.