Mean CYP4F12 expression levels of cell lines were higher in bladder urothelial carcinoma(BLCA), colon adenocarcinoma and rectum adenocarcinoma (COAD_READ), HNSC, LIHC, LUAD, pancreatic adenocarcinoma (PAAD) and stomach adenocarcinoma (STAD), while nearly undetectable in those from acute lymphoblastic leukemia (ALL), lymphoid neoplasm diffuse large B-cell lymphoma (DLBC), glioblastoma multiforme (GBM), acute myeloid leukemia (LAML), brain lower grade glioma (LGG), mesothelioma (MESO), sarcoma (SARC), small cell lung cancer (SCLC), skin cutaneous melanoma (SKCM), THCA and UCEC. The gene discussed is CYP4F12; the disease is bladder transitional cell carcinoma.