“…Therefore, this morphological feature may enable the differentiation between benign and malignant lesions, not only detecting abnormal mucosal vessels but also paying attention to the morphology of the mucosal vessels. Many studies revealed the good diagnostic yield of POCS using NBI; however, these studies evaluated rigorous endoscopic findings as described in Table 2 (Fig.5, 6,7,8,9,10,11,12) [8][9][10]. Because an irregular mucosa including a scale-like appearance was also identified in an inflammatory non-neoplastic mucosa (Fig.11, 12)[7], it is also important not only to detect "irregular surface" but also to observe detailed surface structure.…”