| [ Summary ] |
During colonoscopy, colorectal lesions must be distinguished as either neoplastic or non‒neoplastic. Image‒enhanced endoscopy techniques such as NBI (Narrow Band Imaging) and BLI (Blue LASER Imaging) are useful for differential diagnoses. We previously reported an improved confidence in the diagnosis of diminutive neoplastic colorectal polyps with magnifying NBI. Moreover, magnifying NBI has been reported to provide high accuracy for distinguishing between adenoma and cancer. Many reports have also shown the usefulness of NBI with the Sano, Showa, Jikei, and Hiroshima classifications. Although these classifications are now widely used in daily practice, some confusion arises among endoscopists because of the different terminologies related to endoscopic findings. To standardize these diagnostic strategies, the Japan NBI Expert Team (JNET) classification, which is a unified classification of NBI with magnification colonoscopy, was proposed in 2014. The JNET classification distinguishes among non-neoplastic lesions, neoplastic lesions, and cancer according to both the vessel and surface patterns of the lesions. However, as there is a limit to the diagnosis, it is necessary to improve the diagnosis by combining this classification with pit pattern diagnosis. |