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Endoscopic images of non-polypoid dysplasia. (A) Standard-definition white-light endoscopy. (B) High-definition white-light endoscopy. (C) High-definition narrow-band imaging. (D) Standard-definition chromoendoscopy using indigo carmine at a low concentration (0.04%). (E) Standard-definition chromoendoscopy using indigo carmine at a high concentration (0.2%).
