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Is there a best alternative to treating the obstructed upper pole?

T S Vates1, T Bukowski, J Triest

  • 1Department of Pediatric Urology, Children's Hospital of Michigan, Detroit, USA.

The Journal of Urology
|August 1, 1996
PubMed
Summary

Partial nephrectomy is preferred for obstructed duplicated kidneys, showing no significant renal function loss and a lower reoperation rate compared to upper pole salvage procedures.

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Area of Science:

  • Pediatric Urology
  • Nephrology
  • Surgical Outcomes

Background:

  • Duplicated kidneys with upper pole obstruction are a common congenital anomaly in children.
  • Management decisions impact differential renal function and long-term outcomes.

Purpose of the Study:

  • To compare differential renal function after upper pole salvage versus partial nephrectomy in children with obstructed duplicated kidneys.
  • To evaluate postoperative complications and reoperation rates for both surgical approaches.

Main Methods:

  • Retrospective review of 46 children with unilateral obstructed duplicated kidneys (1988-1995).
  • Comparison of upper pole salvage (ureteropyelostomy/ureteroureterostomy) versus partial nephrectomy.
  • Assessment of differential renal function via nuclear renography and analysis of complication/reoperation rates.

Main Results:

  • Partial nephrectomy group (31 patients) had a 4% reoperation rate and minimal change in renal function (-1.25%).
  • Upper pole salvage group (12 patients) had a 25% reoperation rate and a slight gain in renal function (2.25%).
  • No statistically significant difference in relative renal function between the two groups was observed.

Conclusions:

  • Partial nephrectomy offers comparable renal function preservation with a significantly lower reoperation rate.
  • Upper pole salvage procedures did not demonstrate a significant gain in relative renal function.
  • Partial nephrectomy is recommended as the preferred treatment for most cases of obstructed duplicated kidneys.