Obstructive uropathy

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Obstructive uropathy

Obstructive uropathy involves a blockage of the flow of urine, causing it to back up and injure one or both kidneys.

Obstructive uropathy occurs when urine cannot drain through a ureter because of an obstruction, often ureteral or kidney stones. Urine backs up into the kidney and causes distention of the renal pelvis and calyces (hydronephrosis).

Obstructive uropathy is further differentiated by whether it affects one or both kidneys (unilateral or bilateral) and whether it occurrs suddenly (acute) or is long-standing (chronic):

• Chronic unilateral obstructive uropathy
• Chronic bilateral obstructive uropathy
• Acute unilateral obstructive uropathy
• Acute bilateral obstructive uropathy

Common causes of obstructive uropathy include the following:

• Urinary tract stones
  • Ureteral stones
  • Bladder stones
• Urinary tract tumors
• Retroperitoneal fibrosis
• Benign prostatic hyperplasia
• Adjacent organ tumors
• Colon cancer
• Cervical cancer
• Uterine cancer
• Any cancer that metastasizes (spreads)
• Idiopathic hydronephrosis of pregnancy

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