title: Survival after Radical Cystectomy for Bladder Cancer in Relation to Prior Non-Muscle Invasive Disease in Quebec.
abstract: OBJECTIVE
  The aim of this study was to assess if there is a difference in survival after radical cystectomy (RC) when examined in relation to prior non-muscle invasive bladder cancer (NMIBC) disease vs. invasive cancer de novo at time of diagnosis.
  
  
  METHODS
  We conducted a retrospective study of all patients who underwent RC within Quebec health insurance medical services database during the years (2000-2009). Overall survival (OS) outcome was assessed with Kaplan-Meier curves and hazard ratios (HRs) adjusted for age and gender.
  
  
  RESULTS
  A total of 2,671 subjects met the eligibility criteria. Among them, 19.8% had presumed prior NMIBC that further progressed to invasive disease. Median survival after RC for patients with presumed prior NMIBC was 4.3 years as compared to patients with presumed invasive disease de novo 3.7 years (p = 0.007, Wilcoxon test). Patients with presumed NMIBC at the time of diagnosis had a 16% decrease in the risk of mortality after RC, when compared to patients with presumed invasive BC de novo (HR 0.84, 95% CI 0.73-0.96 (p = 0.0166)).
  
  
  CONCLUSIONS
  Our results suggest a slightly better prognosis, regarding OS after RC for patients with presumed NMIBC who progressed to invasive disease, when compared to patients with presumed invasive disease de novo at the time of diagnosis.
authors: Department of Surgery, Division of Urology, McGill University, Montreal, Que., Canada.
authors: Ahmed S
authors: AS
authors: Zakaria
authors: Fabiano
authors: F
authors: Santos
authors: Wassim
authors: W
authors: Kassouf
authors: Simon
authors: S
authors: Tanguay
authors: Armen
authors: A
authors: Aprikian
mesh_terms: D000368:Aged; D015653:Cystectomy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D016609:Neoplasms, Second Primary / Q000401:mortality* / Q000473:pathology / Q000601:surgery*; D011792:Quebec; D012189:Retrospective Studies; D015996:Survival Rate; D001749:Urinary Bladder Neoplasms / Q000401:mortality* / Q000473:pathology / Q000601:surgery*