Clinical Valve on Narrow Band Imaging for Colorectal Flat Tumors

LI Qing-feng; LIU Zhao-zhou; QIU Li-hua

doi:10.14033/j.cnki.cfmr.2015.13.008

Abstract：Objective:To investigate the clinical effect on narrow band imaging(NBI) for colorectal flat tumors.Method:The association of morphology (Pit Pattern and Capillary Pattern) of colorectal flat lesions resected by EMR with histopathology was observed and the accuracy of estimation of invasive depth by NBI was evaluated.Result:31 cases of lesions were resected by EMR,3 cases of typeⅡa+Ⅱc were received EPMR.Histopathological confirmed that the lesions were Hyperplastic polyp(n=4),tubular adenoma or tubular villous adenoma with low level intraepithelial neoplasia(LGD, n=14,41.2%,14/34),tubular adenoma or tubular villous adenoma with high level intraepithelial neoplasia(LGD,n=12,35.3%,12/34),mucosal carcinoma(n=2,5.9%,2/34),submucosal carcinoma(n=2,5.9%,2/34).Submucosal carcinoma were resected by surgery operation and both the lateral and basal margins of the specimens were free of tumor cells and without surrounding lymph node metastasis.The results of the 34 lesions disposable en-bloc resection rate was 91.2%(31/34),histological curative resection rate was 94.1%(32/34).The accuracy of estimating invasive depth by NBI was 94.1%(32/34).Conclusion:Colorectal lesions of colorectal flat type can accurately be determined by NBI,which can further guide endoscopic minimally invasive treatment.