Clinical Study On Narrow-Band Imaging In The Diagnosis Of Colorectal Neoplasm

Objective: To assess the value of narrow-band imaging (NBI) endoscopy without high magnification in diagnosis of colorectal neoplasm and non-neoplasm.Methods:Endoscopy with NBI was performed in 211 patients with colorectal neoplasm or polypoid lesions. White light endoscopy and NBI endoscopy were performed for each lesion. The diagnosis of endoscopy was made based on the pit pattern or capillary pattern of the lesion. Each lesion was investigated by pathological examination. The diagnosis of white light endoscopy and NBI endoscopy was compared with that of histopathology.Results:â‘ A total of 370 lesions were found in 211 patients. NBI endoscopy could show the pit pattern more clearly than white light endoscopy(P=0.000) and also show the capillary clearly;â‘¡Diagnostic accuracy was 85.41% with white light endoscopy,89.19% with NBI Kudo pattern and 87.30% with NBI Sano pattern (P=0.303);â‘¢NBI Kudo pattern and NBI Sano pattern performed better than white light endoscopy in diagnosing sensitivity (92.57%,94.29% vs 82.86%,P=0.006, P=0.001);â‘£Specificity was 87.69% with white light endoscopy, 86.15% with NBI Kudo pattern and 81.03% with NBI Sano pattern (P=0.156).Conclusions:â‘ Compared with white light endoscopy, NBI endoscopy without high magnification can better observe the colorectal mucosal surface structure and capillary pattern;â‘¡It is an effective method for diagnosis of colorectal neoplasm using NBI endoscopy without high magnification, which may reduce the possibility of missed diagnosis than white light endoscopy.