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Background  The diagnosis of Barrett’s esophagus (BE) is disturbed by numerous factors, including correct gastroesophageal junction judgment, the initial location of the Z-line and the biopsy result above it. The acetic acid (AA) could help to diagnose BE better than high resolution imaging technology or magnifying endoscopy, by providing enhanced contrast of different epithelium. We have noticed AA could produce multiple white circular lines, forming circular stripes (CS), at lower esophagus, which hasn’t been reported by others. This study aimed to investigate whether the CS is a special marker in BE patients.    Methods  A total of 47 BE patients and 63 healthy people were enrolled from March 2016 to October 2016, and 2% AA staining had been operated routinely at lower esophagus under high resolution gastroscopy. We observed whether there were CS after AA staining and the images were compared between the two groups.    Results  CS were confirmed in 42 patients (89.36%) in the BE group and 5 (7.94) in the control group (( χ  2  = 72.931,  P  < 0.001)). The average width of CS was 0.76 ± 0.25 cm in BE group, which was similar to that in the control group (0.88 ± 0.11 cm). Villous or punctate or reticular pattern usually existed above or below the CS.    Conclusions  CS could be found at lower esophagus in most BE patients with AA staining, and this special feature might be valuable in diagnosing, evaluating and following up of BE patients.    Electronic supplementary material  The online version of this article (10.1186/s12876-018-0745-7) contains supplementary material, which is available to authorized users.

Circular stripes were more common in Barrett’s esophagus after acetic acid staining