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Delayed decrease in differential renal function after successful pyeloplasty in children with unilateral antenatally

Fumi Matsumoto1, Kenji Shimada, Mari Kawagoe

  • 1Department of Urology, Osaka Medical Center and Research Institute for Maternal and Child Health, Osaka, Japan. fumim@mch.pref.osaka.jp

International Journal of Urology : Official Journal of the Japanese Urological Association
|June 27, 2007
PubMed
Summary

Functional kidney outcomes after pyeloplasty for congenital hydronephrosis can change over time. Long-term monitoring is essential as initial improvements in differential renal function may not be sustained.

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Published on: April 4, 2025

Area of Science:

  • Pediatric Urology
  • Nephrology

Background:

  • Congenital hydronephrosis is a common condition in children.
  • Ureteropelvic junction obstruction is a primary cause, often treated with pyeloplasty.
  • Assessing long-term functional outcomes is crucial for patient management.

Purpose of the Study:

  • To evaluate the functional outcomes of congenital hydronephrotic kidneys following pyeloplasty.
  • To assess changes in differential renal function (DRF) over time post-surgery.

Main Methods:

  • Retrospective review of pediatric patients undergoing pyeloplasty for unilateral ureteropelvic junction obstruction.
  • Renographic assessment of renal function pre- and post-surgery.
  • Mean follow-up period of 100 months.

Main Results:

  • Differential renal function (DRF) showed variability post-pyeloplasty.
  • Early postoperative improvements in DRF were not always sustained long-term.
  • Some patients experienced a decline in DRF over time, with no recovery observed in those with initial decreases.

Conclusions:

  • Post-pyeloplasty DRF can be unstable in some pediatric patients.
  • Renal function impairment may manifest later, necessitating long-term surveillance.
  • Delayed renographic evaluation is recommended to accurately assess functional recovery and avoid overestimation.