title: [Pyeloplasty follow-up. How and how long?].
abstract: BACKGROUND
  Some controversies still persist about the pueloplasty follow-up and this study aims to determine which test should be done in these patients during the follow-up and for how long these patients should be under control.
  
  
  METHODS
  Forty six children who underwent to pueloplasty were retrospectively reviewed and those with contralateral renal abnormalities were excluded from study. Six children were lost to follow-up and were excluded. Of 40 p (25 M, 14 F) who fulfilled the requirements of this study, 28 were diagnosed prenatally and 28 had a left UPJ obstruction. All children were diagnosed by renal ultrasound, diuretic renography and excretory urogram (except 2). Mean age at Anderson Hynes pyeloplasty was 5.1 months and mean follow-up was 6.1 years. Renal ultrasound at 3 months and every year, and a diuretic renography at 1 year were performed in all children during follow-up. In some of them diuretic renography was repeated.
  
  
  RESULTS
  At 3 months renal ultrasound demonstrated a significant hydronephrosis decrease in all children (p < 0.0001) but not in further controls. Differential renal function remained unchanged after pyeloplasty and during follow-up. However, there was a significant UPJ drainage improvement after pyeloplasty and during follow-up (p < 0.0001, p < 0.005). Any child needed a second pyeloplasty procedure and all of them showed a normal UPJ drainage in the antegrade ureterogram performed on the 5th postoperative day, except one.
  
  
  CONCLUSIONS
  Differential renal function did not improve after pyeloplasty in our children. If renal ultrasound 3 months after pyeloplasty demonstrated a significant hydronephrosis decrease and at 1 year diuretic renography reveals a normal UPJ drainage any change should be expected in the long-term follow-up.
authors.affiliation: Servicio de Urología Pediátrica, Hospital Infantil Universitario La Paz, Madrid.
authors.forename: S
authors.initials: S
authors.lastname: Rivas
authors.forename: F
authors.initials: F
authors.lastname: Hernández
authors.forename: P
authors.initials: P
authors.lastname: López-Pereira
authors.forename: M J
authors.initials: MJ
authors.lastname: Martínez-Urrutia
authors.forename: R
authors.initials: R
authors.lastname: Lobato
authors.forename: E
authors.initials: E
authors.lastname: Jaureguizar
mesh_terms: D000704:Analysis of Variance; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006869:Hydronephrosis / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D007223:Infant; D007231:Infant, Newborn; D007668:Kidney / Q000000981:diagnostic imaging / Q000503:physiopathology; D007682:Kidney Pelvis / Q000601:surgery*; D008297:Male; D012189:Retrospective Studies; D013997:Time Factors; D014463:Ultrasonography; D014519:Ureterostomy; D014567:Urography