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[Early surgery of obstructive uropathies discovered antenatally. First results apropos of 56 cases]
Insights
Early surgery for pyelo-ureteral junction (PUJ) stenosis in children yields excellent outcomes. However, other obstructive uropathies like mega-ureters and posterior urethral valves have a less favorable prognosis, often linked to renal dysplasia.
Area of Science:
- Pediatric Urology
- Nephrology
- Surgical Outcomes
Context:
- 56 children with obstructive uropathy diagnosed via antenatal ultrasound between 1984-1988.
- Included conditions: pyelo-ureteral junction (PUJ) stenosis, vesicorenal reflux, mega-ureters (MU), ureteroceles, posterior urethral valves, and ectopic ureteral orifice.
- Major reflux (Type III-IV) was classified as obstructive due to impaired urine flow.
Purpose:
- To analyze surgical outcomes for various pediatric obstructive uropathies.
- To investigate factors influencing renal function and morphology post-surgery.
- To determine why early PUJ stenosis surgery is more beneficial than for other uropathies.
Summary:
- Reconstructive surgery was performed on 46 children.
- Pyelo-ureteral junction (PUJ) stenosis showed favorable to spectacular functional and morphological outcomes.
- Vesicorenal reflux had excellent results unless significant renal dysplasia was present.
- Mega-ureters and severe posterior urethral valves had poorer prognoses, often associated with renal dysplasia.
Impact:
- Highlights the importance of early intervention for PUJ stenosis in pediatric obstructive uropathy.
- Identifies renal dysplasia as a critical factor affecting outcomes in other uropathies.
- Provides insights into the differential prognosis of various congenital urinary tract obstructions.
Abstract:
Between September 1984 and April 1988, 56 children underwent surgery for an obstructive uropathy discovered on antenatal ultrasound examination. These included 31 cases of stenosis of the pyelo-ureteral junction (PUJ), 9 cases of vesicorenal reflux, 6 mega-ureters (MU), 6 ureteroceles, 3 posterior urethral valves and 1 ectopic ureteral orifice. Major reflux (type III and IV) was included within the obstructive uropathy classification in that it opposes the normal pressure gradient which ensures progression of urine towards the bladder. The nature of the obstruction, morphological study of the kidneys and the renal function itself were very precisely studied and monitored (IVU, ultrasound, isotope tests, DTPA with frusemide and DMSA). In 46 children reconstructive and conservative surgery was possible. Analysis of the various groups of uropathy showed that: 1. Stenosis of the JPU had a very favorable or sometimes spectacular outcome both functionally and morphologically. 2. Cases of reflux showed excellent results, except in the presence of preexisting major renal dysplasia. 3. Mega-ureters had a less good prognosis. Renal growth depended above all on the degree of renal dysplasia which was often associated. 4. This was also true for sever forms of posterior urethral valves. A discussion follows which tries to reply to the following questions: 1. Why does early surgery for stenosis of the JPU give better results? 2. On the other hand, why is the same benefit not obtained in the other obstructive uropathies?