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Published on: July 7, 2026
Antenatally detected pelvi-ureteric junction obstruction: concerns about conservative management
R Subramaniam1, C Kouriefs, A P Dickson
1Department of Paediatric Urology, Booth Hall Children's Hospital, Manchester, UK.
Insights
Conservative management of antenatally detected pelvi-ureteric junction (PUJ) obstruction in children may lead to significant kidney function loss. This loss is often irreversible even after delayed pyeloplasty surgery.
Area of Science:
- Pediatric Urology
- Nephrology
- Surgical Management
Background:
- Antenatally detected pelvi-ureteric junction (PUJ) obstruction is a common congenital anomaly.
- Management strategies range from conservative observation to early surgical intervention.
Purpose of the Study:
- To review the outcomes of conservative management for antenatally detected PUJ obstruction in children.
- To evaluate the impact of management strategy on renal function preservation.
Main Methods:
- Retrospective review of 121 children (142 kidneys) with antenatal PUJ obstruction over 8 years.
- Conservative management was primary, with early pyeloplasty for compromised renal function (<40%).
- Delayed pyeloplasty indicated for functional decline, symptoms, or worsening hydronephrosis.
Main Results:
- A weak negative correlation was observed between anteroposterior diameter and renal function.
- Kidneys undergoing delayed pyeloplasty had larger initial anteroposterior diameters.
- Renal function improvement was less in the delayed pyeloplasty group and inversely related to anteroposterior diameter.
Conclusions:
- Conservative management of some antenatal PUJ obstructions may result in greater, unrecoverable renal function loss.
- The anteroposterior diameter may predict outcomes in PUJ obstruction management.
Objective:
To review the conservative management of antenatally detected pelvi-ureteric junction (PUJ) obstruction in children.
Patients And Methods:
The study included 121 children (142 kidneys) with antenatally diagnosed PUJ obstruction managed over an 8-year period, including 21 who were affected bilaterally; the main focus of the study was on the 100 children affected unilaterally. The intent was to manage these patients conservatively, with immediate surgery (early pyeloplasty) only if renal function was initially compromised (renographic function < 40%). The indications for surgery subsequently (delayed pyeloplasty) included either a deterioration in renal function, the onset of symptoms or increasing hydronephrosis.
Results:
The anteroposterior diameter and renal function were weakly and negatively correlated. The kidneys in the delayed pyeloplasty group had a greater initial mean anteroposterior diameter than had those in the early or the conservative groups (P<0. 05). The improvement in renal function was the lower in the delayed pyeloplasty group than in the early pyeloplasty group; the improvement was inversely related to the anteroposterior diameter.
Conclusions:
The conservative management of some antenatally detected PUJ obstructions probably results in greater loss of function, which is not recovered after surgery.
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