Obstructive Uropathy

grade 2 hydronephrosis

Obstructive Uropathy is where there is a condition whether congenital or acquired that causes urine to back up into either one or both kidneys (hydronephrosis), thus damaging the kidney.This can be grouped according to whether it affects one side or both as well as if it is a sudden onset versus a long-term condition.

  • Acute Uni-lateral obstructive uropathy: Single side, sudden onset and typically a short duration.
  • Acute Bi-lateral obstructive uropathy: Both sides, sudden onset and typically a short duration.
  • Chronic Uni-lateral obstructive uropathy: Single side, slow to develop with a long duration.
  • Chronic Bi-lateral obstructive uropathy: Both sides, slow to develop with a long duration


  • Stones within the ureter (most common acute unilateral)
  • Stones within the bladder
  • Posterior Urethral valves (most common chronic bilateral in male children)
  • Urethral atresia (most common chronic bilateral in female children)
  • Bladder outlet obstruction (most common chronic bilateral)
  • Tumor within the urinary tract
  • Retroperitoneal fibrosis
  • Enlarged prostate (benign prostatic hyperplasia is the most common cause of chronic or acute bilateral in men)
  • Tumors within adjacent organs
  • Ureteral or bladder cancer
  • Colon cancer
  • Cervical cancer
  • Uterine cancer
  • Metastatic cancer
  • Idiopathic hydronephrosis of pregnancy (most common acute bilateral in women)

Just by looking at the information you may be able to deduce the most likely cause. Find out whether it is regarding a male or female,  if it is acute, chronic, unilateral or bilateral, in an adult or child and you should have a good idea to the cause.


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  1. Surgical interventions available to correct the childhood problems?

    • A pyelocutaneostomy or ureterocutaneostomy is the procedure performed for transient drainage of the upper urinary tract (megaureter) in pediatric urology. Generally a percutaneous nephrostomy or a DJ-catheter is not performed since these are mainly the method of treatment for a stone or other foreign obstruction.

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