title: Reduced bladder tumour recurrence rate associated with narrow-band imaging surveillance cystoscopy.
abstract: OBJECTIVE
  To evaluate frequency of recurrences among patients with papillary bladder tumours followed sequentially with conventional white-light (WLI) cystoscopy and narrow-band imaging (NBI) cystoscopy.
  
  
  METHODS
  A cohort of 126 patients with recurrent low-grade papillary bladder tumours were followed every 6 months for 3 years by conventional WLI cystoscopy, and then over the next 3 consecutive years by NBI cystoscopy. Recurrent tumours detected were treated by outpatient fulguration or transurethral resection. We compared the tumour recurrence rate during follow-up with WLI and NBI cystoscopy, using patients as their own controls.
  
  
  RESULTS
  Of the 126 patients, 94% had tumour recurrences during WLI cystoscopy vs 62% during NBI cystoscopy. The mean number of recurrent tumours was 5.2 with WLI cystoscopy vs 2.8 with NBI cystoscopy, and the median recurrence-free survival time was 13 vs 29 months (P= 0.001).
  
  
  CONCLUSIONS
  Compared with follow-up with WLI cystoscopy, NBI cystoscopy was associated with fewer patients having tumour recurrences, fewer numbers of recurrent tumours, and a longer recurrence-free survival time.
authors: Department of Urology, Memorial Sloan-Kettering Cancer Center, New York, NY, USA. herrh@mskcc.org
authors: Harry W
authors: HW
authors: Herr
authors: Sherri M
authors: SM
authors: Donat
mesh_terms: D015331:Cohort Studies; D003558:Cystoscopy / Q000379:methods*; D005500:Follow-Up Studies; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008027:Light; D009364:Neoplasm Recurrence, Local / Q000473:pathology*; D001749:Urinary Bladder Neoplasms / Q000473:pathology*