Renal arteriography in renal pelvic tumors and ureteral tumors may reveal thinning or obstruction of the intrarenal artery, often indicating infiltration. Look for problems with renal function and see if blood glucose glucose has any effect. What are the symptoms that are easily confused with them? 1. Ureteral stones Ureteral stones can cause upper urinary tract obstruction. When they are negative, urography can reveal filling defects in the ureter, which need to be differentiated from ureteral tumors. Ureteral stones are mostly seen in young adults under 40 years of age and are characterized by colic, rare carnal hematuria, mostly intermittent microscopic hematuria, and often coexist with renal colic. Retrograde contrast ureteral tumors are locally dilated and show cup-like changes, while the stones are unmistakably changed. 2.Ureteral polyp Mostly seen in young adults under 40 years old, with long medical history and inconspicuous blood coat, ureteral imaging shows filling defect, but the surface is smooth and long, the scope is larger than ureteral tumor, mostly above 2cm. The location is mostly near the ureteropelvic junction and ureterobladder junction, and repeatedly finding tumor cells in urine is negative. 3.Ureteral stenosis is manifested as lumbar distension and hydronephrosis, which should be differentiated from ureteral cancer. The causes of ureteral stricture are various. Non-tumor induced ureteral stricture has no history of hematuria, and urography shows simple stricture without filling defect. Repeated urine searching for tumor cells are negative. 4.Ureteral blood clot Ureteral filling defect is similar to ureteral tumor, but ureteral blood clot is variable, and its location, size and morphology can be found to be changed after two imaging examinations at different times. 5.Bladder cancer Bladder cancer located around the ureteral orifice, which will cover the ureteral orifice, needs to be distinguished from the lower ureteral cancer protruding into the bladder. There are two cases of ureteral cancer protruding into the bladder: one is that the tumor has a tip and the tip is in the ureter; the other is that the tumor does not have a tip and the tumor is in each part of the ureter and bladder.