Comparison of narrow-band imaging flexible cystoscopy and white-light imaging rigid cystoscopy in recurrence detection of the non-muscle invasive bladder cancer
Yuan Qian1, Zhang ling1, Wang Qinrong1, Xiao Kefeng1
1Department of Urology, Shenzhen People's Hospital, Shenzhen Urological Minimally Invasive Surgery Engineering Center, Shenzhen 518003, China
Abstract：Objective: To evaluate the value of narrow-band imaging (NBI) flexible cystoscopy in recurrence detection of the non-muscle invasive bladder cancer. Methods: Cystoscopic records from January 2014 to December 2016 were retrospectively reviewed. The included patients were those who underwent transurethral resection of non-muscle invasive bladder urothelial carcinoma (Ta or T1). The excluded cases were those who were complicated with urothelial carcinoma in other sites or without accurate surgical records or pathological records. Results: 165 cystoscopic records were included for analysis. There were 82 records for 51 patients by NBI flexible cystoscopy and 83 records for 46 patients by white-light imaging (WLI) rigid cystoscopy. The median follow-up time was 13 months for NBI flexible cystoscopy group and 11 months for WLI rigid cystoscopy group postoperatively. Thirteen biopsies in NBI flexible cystoscopy group were performed and 5 biopsies were positive pathologically. Four biopsies in WLI rigid cystoscopy group were performed and 3 were positive pathologically. False positive rate in NBI group was 10.4%, and that in WLI group was 1.2%. Conclusions: Most of the advantages were gained by the flexibility of cystoscopy, not by the imaging technology, such as less pain for male patients, more positive findings on the other parts of bladder mucosa. However, NBI may cause more false positive rate and unnecessary biopsy for some patients.
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