Outcome analysis of pediatric pyeloplasty in units with less than 20% differential renal function

This study which appears to be the largest in the literature of pediatric UPJO with DRF ≤20%, conclusively shows that there is statistically significant improvement in function after pyeloplasty which remains stable during the period of growth with no long term complications. Nephrectomy should be considered only in patients with nil or <5% uptake on isotope imaging with associated (a) no parenchyma on imaging or on exploration, (b) pyonephrosis, (c) hypertension or (d) minimal urine output on percutaneous nephrostomy.