Figure 1: Representative NBI images of early esophageal cancer. A. Endoscopic examination with narrow-band imaging reveals the presence of brownish epithelium. B. Endoscopic examination with narrow-band imaging reveals the brownish dots. C. The presence of tortuous intraepithelial papillary capillary loop (IPCL), caliber change in IPCL and variety in IPCL shapes.