Ureteropelvic Junction Obstruction in Early Childhood: Comparison of Surgical Therapy and Surveillance. A Prospective, Randomized, Controlled Multi-Center Study

Ureteropelvic Junction Obstruction in Early Childhood: Comparison of Surgical Therapy and Surveillance in Children With Scintigraphically Prooved Obstruction. A Prospective, Randomized, Controlled Multi-Center Study

In this randomized trial surgical therapy and surveillance of ureteropelvic junction obstruction will be compared, regarding partial renal function.

Inclusion Criteria:

• unilateral ureteropelvic junction obstruction
• diameter of renal pelvis greater 12 mm
• partial renal function of 35%-55% proofed by scintigraphy
• urodynamically relevant decrease in renal drainage proofed by diuresis scintigraphy at the age of 4 weeks up to 6 months
• Abscence of clinical symptoms
• Healthy contralateral kidney

Exclusion Criteria:

• Global decrease in renal function
• renal dystopia
• megaureter
• vesico-ureteral reflux
• progressive hydronephrosis
• oligohydrammnion
• voiding dysfunction
• bilateral hydronephrosis
• severe chronical illness
• decrease of partial renal function of more then 5% during allocation