Ureteral stenosis

The ureter normally has 3 physiological bends, which is the narrow segment. The first stenosis was inserted into the bladder wall; the second stenosis was inserted across the iliac artery into the small pelvis; the third stenosis was inserted into the bladder wall. Ureteral stenosis means that the ureteral lumen is narrower than normal in part or whole due to various reasons. Although the continuity of the lumen is not interrupted, it has caused varying degrees of upper urinary tract obstruction and hydronephrosis.