[Narrowband fibrocystoscopy in diagnosis of bladder cancer]

A total of 97 patients (59 males, 38 females, age 26-88 years) with cancer of the urinary bladder (pTa, pT1, pT2) were initially examined with white-light cystoscopy, then narrowband cystoscopy (Narrow Band Imaging, NBI) with application of videofibrocystoscope Okympus. A total of 147 procedures were performed. Videofibrocystoscopy in white light has detected 18 recurrent tumors (sensitivity 0.12 tumor/operation). Narrowband videofibrocystoscopy has detected 17 more recurrencies (sensitivity 0.24 tumor/operation). A histological recurrence was confirmed at standard cystoscopy in 17 of 18 cases (specificity 94%), at narrowband fibrocystoscopy--in 30 of 35 cases (specificity 86%). The above pilot experience with narrowband videofibrocystoscopy has demonstrated that this technique has much higher contrast and acutance of imaging as well as sensitivity vs standard rigid cystoscopy in white light.