Uroepithelial carcinoma is a kind of malignant tumor, which is formed after malignant transformation of uroepithelium. The renal pelvis, ureter, bladder and urethra are covered with uroepithelium. If the uroepithelium of the renal pelvis, ureter, bladder and urethra undergoes malignant degeneration, uroepithelial carcinoma will be caused, and tumors of the corresponding areas are renal pelvis, ureter, bladder and urethra, respectively. Uroepithelial carcinoma can be divided into non-muscle invasive and muscle invasive. The cause of uroepithelial carcinoma is unclear, and may be related to smoking, exposure to rubber, paint, and toxic substances such as benzene, phenol, anthracene, and quinone. After discovering uroepithelial carcinoma, one should go to regular hospitals for treatment in time to avoid more serious effects caused by cancer.