We found that IL4I1 was highly expressed in 25 types of tumors, namely ACC, bladder urothelial carcinoma, BRCA, CESC, cholangiocarcinoma, COAD, ESCA, GBM, HNSC, KIRC, KIRP, LAML, LGG, LIHC, LUAD, LUSC, OV, PAAD, PRAD, READ, SKCM, STAD, THCA, UCEC, and UCS. The gene discussed is IL4I1; the disease is bladder transitional cell carcinoma.