title: Prolonged follow-up after paediatric pyeloplasty: are repeat scans necessary?
abstract: OBJECTIVE
  To establish the value of repeat renal scans to assess the relative renal function after successful paediatric pyeloplasty.
  
  
  METHODS
  Renal scans were assessed from 138 patients after successful pyeloplasty; the relative renal function before and immediately after pyeloplasty were compared, as was split renal function at 3.5 and 5.5 years after surgery.
  
  
  RESULTS
  With a few exceptions the relative renal function before and after pyeloplasty was stable. Repeat renal scans 3.5 and 5.5 years after surgery also showed stable split renal function, even if the renal function was already diminished.
  
  
  CONCLUSIONS
  Repeat renal scans are not necessary after successful pyeloplasty in children, as most operated renal units showed stable renal function for 5-7 years. Further studies are needed to investigate whether renal function changes further after puberty.
authors.affiliation: Paediatric Urology, Sophia Children's Hospital, Erasmus MC, Rotterdam, The Netherlands. j.vandenhoek@erasmusmc.nl
authors.forename: Joop
authors.initials: J
authors.lastname: van den Hoek
authors.forename: Andra
authors.initials: A
authors.lastname: de Jong
authors.forename: Jeroen
authors.initials: J
authors.lastname: Scheepe
authors.forename: Fred
authors.initials: F
authors.lastname: van der Toorn
authors.forename: Katja
authors.initials: K
authors.lastname: Wolffenbuttel
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007668:Kidney / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery; D007677:Kidney Function Tests; D007682:Kidney Pelvis / Q000503:physiopathology / Q000601:surgery; D011866:Radioisotope Renography; D012189:Retrospective Studies; D013997:Time Factors; D014517:Ureteral Obstruction / Q000503:physiopathology / Q000601:surgery*; D013520:Urologic Surgical Procedures / Q000379:methods*