Comparison of magnifying chromoendoscopy and narrow band imaging for diagnosis of small colorectal polyps

Backgrounds and aims: Narrow band imaging (NBI) uses optical filters for red-green-blue sequential illumination and narrows the bandwidth of spectral transmittance. Chromoendoscopy offers the detailed analysis of the polyp surface mucosa with special regard to the pit pattern. The aim of this prospective pilot study was to clarify the clinical usefulness of NBI magnification in assessment of pit patterns for the diagnosis of colorectal polyps. Secondary aim was to investigate whether NBI magnification is capable to predict the histology of polyps. Patients and methods: A total of 25 colorectal polyps, 8 hyperlas…