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We read with considerable interest the report by Alder et al (Gut 2008;57:59–64) concerning their prospective randomised study on narrow-band imaging (NBI) versus conventional high-resolution imaging for colorectal adenoma detection. The study indicated an increased adenoma detection rate for NBI colonoscopy, but the results were not statistically significant. Wide-angle colonoscopes (Olympus, Hamburg, Germany) were used during instrument withdrawal for both the NBI and conventional groups, but details on the Olympus systems and their actual function settings were not described by the authors.
Recently, we conducted a prospective pilot study to assess the feasibility of using NBI for detecting colorectal adenomatous lesions.1 The total number of adenomatous lesions detected by NBI was significantly higher than high definition colonoscopy (p = 0.02). Based on macroscopic type, flat lesions were identified more often by NBI (p = 0.04). We used an EVIS LUCERA SPECTRUM video endoscopic system …
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