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. 2023 Jun;68(6):2553-2560.
doi: 10.1007/s10620-022-07816-x. Epub 2023 Jan 7.

Usefulness of Acetic Acid Spray with Narrow-Band Imaging for Identifying the Margin of Sessile Serrated Lesions

Yoshiyasu Kono  1   2 , Reiji Higashi  3   4 , Hidetaka Mizushima  3 , Daisuke Shimizu  3   5 , Tetsuya Katayama  3   6 , Masanari Kosaka  3   5 , Issei Hirata  3   5 , Tetsu Hirata  3 , Tatsuhiro Gotoda  3   7 , Koji Miyahara  3 , Yuki Moritou  3 , Masaki Kunihiro  3 , Masahiro Nakagawa  8 , Koichi Ichimura  9 , Hiroyuki Okada  10   11
Affiliations

Usefulness of Acetic Acid Spray with Narrow-Band Imaging for Identifying the Margin of Sessile Serrated Lesions

Yoshiyasu Kono et al. Dig Dis Sci. 2023 Jun.

Abstract

Background: Sessile serrated lesions (SSLs) are precursors of colon cancer, especially in cases of large, right colon. However, they are difficult to not only detect, but only clarify the margin of the lesion, which can lead to the poor endoscopic treatment outcomes.

Aims: This study evaluated the usefulness of acetic acid spray with narrow-band imaging (A-NBI) for the better visualization of the margin of SSLs.

Methods: From January 2013 to March 2022, patients with superficial elevated polyps suspected of being SSLs ≥ 10 mm with an endoscopic diagnosis that had been endoscopically resected at Hiroshima City Hiroshima Citizens Hospital were enrolled. Endoscopic images with white-light imaging (WLI), narrow-band imaging (NBI), indigo-carmine (IC), and A-NBI were recorded in each lesion and were randomly arranged and assessed by 10 endoscopists. We compared the visibility score (1 to 4) and color differences (ΔE) between inside and outside of the lesions among WLI, NBI, IC, and A-NBI.

Results: Forty-one lesions in 33 cases were included, and a total of 164 images were evaluated. As for the visibility score, most of the lesions were scored as 1 or 2 on WLI, whereas most were scored 4 on A-NBI. The median ΔE of A-NBI was also significantly higher than that of WLI, NBI, or IC (20.5 vs. 8.3 vs. 8.2 vs. 12.3, P < 0.01). A significant correlation was observed between the color difference and visibility score (r = 0.53, P < 0.01).

Conclusions: A-NBI may be a useful modality for identifying the margin of SSLs.

Keywords: Acetic acid; Chromoendoscopy; Image enhanced endoscopy; Narrow-band imaging; Sessile serrated lesions.

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