Obstructive uropathy occurs when urine cannot drain through a ureter (a tube that carries urine from the kidneys to the bladder). Urine backs up into the kidney and causes it to become swollen (hydronephrosis).
Obstructive uropathy can affect one or both kidneys. It can occur suddenly, or be a long-term problem.
Common causes of obstructive uropathy include:
- Bladder stones
- Kidney stones
- Benign prostatic hyperplasia (enlarged prostate)
- Bladder or ureteral cancer
- Colon cancer
- Cervical cancer
- Uterine cancer
- Any cancer that spreads
- Scar tissue that occurs inside or outside of the ureters
- Problems with the nerves that supply the bladder
Rarely, the problem occurs during pregnancy. This condition is called idiopathic hydronephrosis of pregnancy.
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