Bladder, renal pelvic, and ureteral tumors comprise the main urothelial tumors of urinary tract. Seventy percent of urothelial cancers are papillary, 10 percent are non-papillary, and 20 percent are mixed. The incidence of urothelial cancers in males is two to three times that in females. Although bladder cancer occurs most frequently in the bladder triangular area or a lateral wall, it can occur anywhere. Many bladder tumors are papillary, and their surface appears jagged in ultrasound images. Those of stage T2a or greater are distinguished from T1 by invasion of the muscular layer. For differential diagnosis with bladder cancer, bladder stone, blood clotting, sedimentation, ureteral orifices, mucosal edema by inflammation, extrusion of the prostate gland and trabeculation are considered possible causes. Renal pelvic cancer accounts for about 13 percent of all renal tumors. Ureteral cancer is rare, accounting for only about 1 percent of all cancers of the urinary tract. Ureteral cancer occurs mutifocusly in 30 percent to 70 percent of cases.