title: Risk factors for end stage renal disease in non-WT1-syndromic Wilms tumor.
abstract: OBJECTIVE
  We assessed risk factors for end stage renal disease in patients with Wilms tumor without known WT1 related syndromes. We hypothesized that patients with characteristics suggestive of a WT1 etiology (early onset, stromal predominant histology, intralobar nephrogenic rests) would have a higher risk of end stage renal disease due to chronic renal failure. We predicted a high risk of end stage renal disease due to progressive bilateral Wilms tumor in patients with metachronous bilateral disease.
  
  
  METHODS
  End stage renal disease was ascertained in 100 of 7,950 nonsyndromic patients enrolled in a National Wilms Tumor Study during 1969 to 2002. Risk factors were evaluated with cumulative incidence curves and proportional hazard regressions.
  
  
  RESULTS
  The cumulative incidence of end stage renal disease due to chronic renal failure 20 years after Wilms tumor diagnosis was 0.7%. For end stage renal disease due to progressive bilateral Wilms tumor the incidence was 4.0% at 3 years after diagnosis in patients with synchronous bilateral Wilms tumor and 19.3% in those with metachronous bilateral Wilms tumor. For end stage renal disease due to chronic renal failure stromal predominant histology had a HR of 6.4 relative to mixed (95% CI 3.4, 11.9; p<0.001), intralobar rests had a HR of 5.9 relative to no rests (95% CI 2.0, 17.3; p=0.001), and Wilms tumor diagnosis at less than 24 months had a HR of 1.7 relative to 24 to 48 months and 2.8 relative to greater than 48 months (p=0.003 for trend).
  
  
  CONCLUSIONS
  Metachronous bilateral Wilms tumor is associated with high rates of end stage renal disease due to surgery for progressive Wilms tumor. Characteristics associated with a WT1 etiology markedly increased the risk of end stage renal disease due to chronic renal failure despite the low risk in non-WT1 syndromic cases overall.
authors.affiliation: Department of Biostatistics, University of Washington, Seattle, Washington 98112, USA. janelange15@gmail.com
authors.forename: Jane
authors.initials: J
authors.lastname: Lange
authors.forename: Susan M
authors.initials: SM
authors.lastname: Peterson
authors.forename: Janice R
authors.initials: JR
authors.lastname: Takashima
authors.forename: Yevgeny
authors.initials: Y
authors.lastname: Grigoriev
authors.forename: Michael L
authors.initials: ML
authors.lastname: Ritchey
authors.forename: Robert C
authors.initials: RC
authors.lastname: Shamberger
authors.forename: J Bruce
authors.initials: JB
authors.lastname: Beckwith
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Perlman
authors.forename: Daniel M
authors.initials: DM
authors.lastname: Green
authors.forename: Norman E
authors.initials: NE
authors.lastname: Breslow
mesh_terms: D002675:Child, Preschool; D016162:Genes, Wilms Tumor; D006801:Humans; D007223:Infant; D007676:Kidney Failure, Chronic / Q000453:epidemiology* / Q000209:etiology*; D007680:Kidney Neoplasms / Q000150:complications* / Q000235:genetics; D012307:Risk Factors; D009396:Wilms Tumor / Q000150:complications* / Q000235:genetics