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. 2021 Aug 6;9(5):402–407. doi: 10.1093/gastro/goab028

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© The Author(s) 2021. Published by Oxford University Press and Sixth Affiliated Hospital of Sun Yat-sen University

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 1. — A representative case of NBI-undetectable superficial esophageal squamous cell carcinoma. (A) The lesion was not detected under WLE in the esophagus. ESD scar (white arrow) is noticed at the 10 o’clock position. (B) On non-magnifying NBI endoscopy, the brownish area was not clearly identified. (C) The LVL appeared on the anterior wall by LCE with multiple irregularly shaped LVLs in the background mucosa. NBI, narrow-band imaging; WLE, white-light endoscopy; ESD, endoscopic submucosal dissection; LCE, Lugol chromoendoscopy; LVL, Lugol-voiding lesion.