title: Ureterocele associated with a single collecting system of the involved kidney.
abstract: OBJECTIVE
  This is a study concerning ureteroceles associated with a single collecting system of the involved kidney.
  
  
  METHODS
  Over an eight-year period 9 children (5 boys, 4 girls) had a ureterocele subtending a single collecting system, whereas 63 children had duplex ureteroceles. Malformations of other organ systems were present in only 1 patient.
  
  
  RESULTS
  Three patients have undergone surgical interventions: a transurethral incision of bilateral obstructive ureteroceles in 1 and nephroureterectomy in 2. In 4 cases cystic/dysplastic kidneys involuted and were reabsorbed with collapse of the ureteroceles. The last 2 patients have received antibiotic treatment for single episodes of a urinary tract infection.
  
  
  CONCLUSIONS
  Earlier reports of a high incidence of concomitant anomalies and male predominance in patients with single-system ectopic ureteroceles could not be verified by our experience. Our current policy for a patient is careful evaluation, individualized therapy, and long-term surveillance.
authors.affiliation: Department of Urology, Radboud University Hospital, Nijmegen, The Netherlands.
authors.forename: W F
authors.initials: WF
authors.lastname: Feitz
authors.forename: M L
authors.initials: ML
authors.lastname: Ritchey
authors.forename: D A
authors.initials: DA
authors.lastname: Bloom
mesh_terms: D000293:Adolescent; D002648:Child; D005260:Female; D005315:Fetal Diseases; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007668:Kidney / Q000002:abnormalities*; D008297:Male; D014518:Ureterocele / Q000150:complications*