title: Ureteropelvic junction obstruction in upper and lower moiety of duplex renal systems.
abstract: OBJECTIVE
  To review our experience with ureteropelvic junction obstruction in a duplicated renal collecting system.
  
  
  METHODS
  The records of 7 patients with ureteropelvic junction obstruction in a duplex collecting system were reviewed. In addition to routine demographics, each case was reviewed for presenting symptoms, site of obstruction, and type of surgical treatment.
  
  
  RESULTS
  Three of the 7 cases involved obstruction of the upper pole moiety, and the remaining 4 involved the lower pole segment of a duplex system. Obstruction of the upper and lower pole segments was found in both incomplete and complete duplicated collecting systems.
  
  
  CONCLUSIONS
  Careful preoperative evaluation of patients with ureteropelvic junction obstruction will usually identify segmental obstruction in a duplicated system. Treatment should be individualized based on site of obstruction and degree of function remaining in the affected segment.
authors.affiliation: Department of Urology, University of Tennessee, Memphis.
authors.forename: D S
authors.initials: DS
authors.lastname: Ho
authors.forename: G R
authors.initials: GR
authors.lastname: Jerkins
authors.forename: M
authors.initials: M
authors.lastname: Williams
authors.forename: H N
authors.initials: HN
authors.lastname: Noe
mesh_terms: D000015:Abnormalities, Multiple / Q000601:surgery; D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007682:Kidney Pelvis / Q000601:surgery; D007685:Kidney Tubules, Collecting / Q000002:abnormalities* / Q000601:surgery; D008297:Male; D014513:Ureter / Q000002:abnormalities* / Q000601:surgery; D014517:Ureteral Obstruction / Q000209:etiology* / Q000601:surgery