HTR7 was found to be highly expressed in different kinds of cancer, including BLCA, BRCA, CESC, HNSC, ESCA, KIRC, LAML, KIRP, LUSC, PAAD, and PCPG, and lowly expressed in PRAD, READ, SKCM, and TGCT (Figure 3M). The gene discussed is HTR7; the disease is cancer.