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. 2020 Sep 3;7(1):e000444. doi: 10.1136/bmjgast-2020-000444

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© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Tethered capsule optical coherence tomography (OCT) from a patient with C2M4 non-dysplastic Barrett’s oesophagus (BE). Inset shows narrow band imaging view from a previous endoscopy. (A) En face OCT at 200 µm depth, (B) 400 µm depth and (C) full depth projection. Scale bars 1 cm. Some longitudinal pullback non-uniformity can be observed in the BE segment. (D–F) Enlargements showing glands and mucosal pattern at the gastro-oesophageal junction (GEJ). Scale bars 1 mm. (G) Cross-sectional OCT from the GEJ showing atypical glands. Scale bar 500 µm. Biopsy at the GEJ (inset) from a prior oesophagogastroduodenoscopy (9 months earlier) shows a large dilated cardiac gland (arrow) with smaller peripheral glands from the superficial mucosa.