Through the TISCH2 database, we identified the cell subtypes in LAML (GSE154109), glioma (GSE131928_10X), HNSC (GSE103322), OV (GSE130000), and PRAD (GSE150692) and described the IL18RAP expression levels in different clusters of cells (Figure 7A–7E). The gene discussed is IL18RAP; the disease is central nervous system cancer.