Colorectal Neuroendocrine Neoplasm Detection Rate During Colonoscopy: Results From Large-Scale Data of Colonoscopies in Japan.

Sekiguchi, Masau; Kawamura, Takuji; Horiguchi, Go; Mizuguchi, Yasuhiko; Takamaru, Hiroyuki; Toyoizumi, Hirobumi; Kato, Masayuki; Kobayashi, Kiyonori et al. · Am J Gastroenterol · 2025

cross_sectional · Level IV

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Abstract

This study investigated the detection rate of colorectal neuroendocrine neoplasms (NENs) using large-scale colonoscopy data. This cross-sectional analysis used large-scale data from a Japanese multicenter observational study of colonoscopies performed from 2010 to 2020. Among 82,005 colonoscopy cases, colorectal NENs were identified in 71 (67 of which were neuroendocrine tumors), with a detection rate of 0.087% (95% confidence interval: 0.069-0.109). Most were small rectal lesions, with only 4 >10 mm in size and 3 located in the colon. The detection rate of colorectal NENs during colonoscopy is substantially higher than expected.

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