Additional 30-second observation of the right-sided colon for missed polyp detection with linked color imaging compared with narrow band imaging

• Published in: Endoscopy International Open 2024-10, Vol.12 (10), p.E1092-E1101
• Main Authors: Hashimoto, Hikaru, Yoshida, Naohisa, Inagaki, Yoshikazu, Fukumoto, Kohei, Hasegawa, Daisuke, Okuda, Kotaro, Tomie, Akira, Yasuda, Ritsu, Morimoto, Yasutaka, Murakami, Takaaki, Inada, Yutaka, Tomita, Yuri, Kobayashi, Reo, Inoue, Ken, Hirose, Ryohei, Dohi, Osamu, Itoh, Yoshito
• Format: Article
• Language: English
• Subjects: Diagnosis and imaging (inc chromoendoscopy, NBI, iSCAN, FICE, CLE...); Endoscopy Lower GI Tract; Original article; Polyps / adenomas
• ISSN: 2364-3722; 2196-9736
• DOI: 10.1055/a-2399-7554

Background and study aims We previously demonstrated the efficacy of an additional-30-seconds (Add-30s) observation with linked color imaging (LCI) or narrow band imaging (NBI) of the cecum and ascending colon (right-sided colon) after white light imaging (WLI) observation for improving adenoma detection rate (ADR) by 3% to 10%. We herein compared Add-30s LCI with Add-30s NBI in a large number of cases. Patients and methods We retrospectively collected 1023 and 1011 cases with Add-30s LCI and NBI observation for right-sided colon in 11 affiliated institutions from 2018 to 2022 and propensity score matching was performed. Add-30s observation was as follows. First observation: WLI observation of the right-sided colon as first observation. Second observation: Reobservation of right-sided colon by Add-30s LCI or NBI. The comparison of the mean numbers of adenoma+sessile serrated lesions (SSLs) and adenomas per patient (MASP and MUTYH-associated polyposis) were analyzed in the Add-30s LCI/NBI groups. The increase in right-sided ADR was also analyzed in the groups. Results Among 748 matched cases in the Add-30s LCI/NBI groups, the MASP and MAP were 0.18/0.19 (P = 0.54) and 0.14/0.15 (P = 0.70). Among experts, they were 0.17/0.22 (P = 0.16) and 0.15/0.21 (P = 0.08). Among non-experts, they were 0.13/0.12 (P = 0.71) and 0.12/0.07 (P = 0.04). The right-sided ADRs of the first+second observations in the LCI and NBI groups were 32.2% and 28.9% (P = 0.16) and the increase of ADRs were 7.5% and 7.2% (P = 0.84). Conclusions In right-sided colon, the detection of adenoma/SSL did not differ between Add-30s LCI and NBI. Both of them significantly increased ADR.