AB066. The diagnostic value of narrow-band imaging for flat bladder lesions
Printed Abstract

AB066. The diagnostic value of narrow-band imaging for flat bladder lesions

Yifan Chang, Yinghao Sun, Zhensheng Zhang, Weidong Xu, Meimian Hua, Maoyu Wang, Aiguo Wang, Chuanliang Xu

Department of Urology, Changhai Hospital, Shanghai 200000, China


Background: To investigate the diagnostic value of narrow-band imaging for flat bladder lesions.

Methods: Forty-nine patients with flat bladder lesions diagnosed by white light cystoscopy + narrow-band imaging followed by transurethral resection were included. The diagnostic value of narrow-band imaging was compared with postoperative pathological results.

Results: A total of 59 flat lesions were identified, in which 8 were normal urothelium, 3 were chronic inflammation, 1 was papillary urothelial neoplasm of low malignant potential, 2 were mild dysplasia, 1 was moderate dysplasia, 1 was severe dysplasia, 3 were carcinoma in situ, 16 were low-grade papillary urothelial carcinoma, 16 were high-grade papillary urothelial carcinoma, and 8 were invasive papillary urothelial carcinoma. For narrow-band imaging, the sensitivity was 86.7% (39/45), specificity was 57.1% (8/14), diagnostic accuracy was 79.7% (47/59), false-positive rate was 42.9% (6/14), positive predictive value was 86.7% (39/45), negative predictive value was 57.1% (8/14), area under receiver operating characteristic (ROC) curve was 0.719. Among these lesions, the sensitivity and specificity for postoperative recurrent lesions were 100% (3/3) and 40% (2/5), respectively, and those for erythematous patch-like lesions were 90% (9/10) and 100% (4/4), respectively.

Conclusions: Narrow-band imaging can improve the detection rate for flat bladder tumor lesions, and reduce the risk for missed diagnosis under white light cystoscopy, especially for otherwise indistinguishable erythematous patch-like lesions.

Keywords: Bladder tumors; flat bladder lesions; flexible cystoscopy; narrow-band imaging


doi: 10.21037/tau.2018.AB066


Cite this article as: Chang Y, Sun Y, Zhang Z, Xu W, Hua M, Wang M, Wang A, Xu C. The diagnostic value of narrow-band imaging for flat bladder lesions. Transl Androl Urol 2018;7(Suppl 5):AB066. doi: 10.21037/tau.2018.AB066