Value of magnifying chromoendoscopy and narrow band imaging (NBI) in classifying colorectal polyps: a prospective controlled study

Background and study aims: Chromoendoscopy in combination with magnifying endoscopy is useful to distinguish neoplastic from non-neoplastic colorectal polyps. Narrow band imaging (NBI) has been developed as a new technique to differentiate tissue patterns in vivo. The aim of the present study was to directly compare the diagnostic values of chromoendoscopy and NBI for the differentiation of neoplastic from non-neoplastic colorectal polyps. Patients and methods: 200 colorectal polyps from 99 patients were distributed in a 1:1 ratio for analyzing the surface according to the pit pattern classification and vascular…