PURPOSE: The benefit of surgery on renal function in unilateral ureteropelvic junction stenosis (UPJS) is still debated. We evaluated renal function outcome after unilateral pyeloplasty in 53 @entity1 . MATERIALS AND METHODS: We retrospectively reviewed 123I-hippuran renography performed at diagnosis and 5 to 15 years (mean +/- SD 7 +/- 3 years) after successful pyeloplasty. UPJS was prenatally detected in 26 @entity1 because of @entity293 in 17 and miscellaneous reasons in 10. @entity177 ( @entity177 ) and absolute function were measured on background corrected renograms. Absolute function of the affected and @entity8 was determined by an accumulation index (AI), representing the percent injected dose extracted by each kidney 30 to 90 seconds after the heart peak. RESULTS: Preoperatively 33 of the 53 UPJS kidneys had a decreased AI but only 8 had a @entity177 of less than 40%, which was improved in 7 at followup. In addition, the AI improved in 29 kidneys, of which 19 (36%) normalized. Of the UPJS kidneys 14 had an initially decreased AI that remained abnormal at followup. In these kidneys preoperative @entity177 was less than 40% in all. At followup @entity177 was greater than 40% in 4 @entity1 , in whom the AI of the UPJS kidney did not improve but the AI of the contralateral one decreased from supranormal to normal. Seven @entity8 had a supranormal AI, whereas the AI remained normal in 3, of which the @entity177 in the UPJS kidney remained at less than 40%. The AI and @entity177 were normal in 20 UPJS kidneys and remained normal. CONCLUSIONS: When normal, the AI and @entity177 reflected renal function outcome similarly. The AI added relevant information in UPJS kidneys with impaired function, showing compensation of the contralateral kidney.

Unilateral ureteropelvic junction obstruction in XXXX : long-term followup after unilateral pyeloplasty.

@entity1 :: ('9606', 'Species') :: ['children'] @entity177 :: ('MESH:D051437', 'Disease') :: ['Relative function', 'RF'] @entity8 :: ('MESH:D007674', 'Disease') :: ['contralateral kidneys'] @entity293 :: ('MESH:D014552', 'Disease') :: ['urinary tract infection']
@entity1 :: (9606,Species) :: ['children']
