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(a) Conventional endoscopy shows an esophageal circumferential long-segment neoplasia with hyperemic changes and nodularity of surface mucosa which turns to brownish discoloration (b) under narrow-band imaging system. (c) Under magnification with narrow-band imaging, abnormal superficial vessels are well demonstrated (Inoue's classification type VN). (d) Chromoendoscopy with 1.5% Lugol's solution shows extended Lugol-voiding area.
