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left: mid-esophagus, right: lower esophagus
left: white light endoscopy picture, right: NBI (narrow band imaging) picture
left: white light endoscopy, right: indigo carmine chromoendoscopy (after dye spraying)
© 일원내시경교실 바른내시경연구소 이준행. EndoTODAY Endoscopy Learning Center. Jun Haeng Lee (since 1999-8-23)