Gastrointestinal endoscopy · 2020
Increased risk of metachronous large serrated polyps in individuals with 5- to 9-mm proximal hyperplastic polyps: data from the New Hampshire Colonoscopy Registry.
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Anderson Joseph C, Robinson Christina M, Butterly Lynn F
Аннотация
BACKGROUND AND AIMS: Because data on metachronous risk for patients with index proximal 5- to 9-mm hyperplastic polyps (HPs) are limited, the clinical significance of these polyps is unclear. Conversely, published data suggest that sessile serrated polyps (SSPs), traditional serrated adenomas (TSAs), and large (≥1 cm) HPs are high-risk lesions requiring close surveillance. We used data from the New Hampshire Colonoscopy Registry (NHCR) to examine the risk of metachronous large SPs and advanced neoplasias (ANs) in patients with 5- to 9-mm proximal HPs.
METHODS: We included adults with at least 1 polyp resected at index colonoscopy and a surveillance examination 12 months or more after index. Outcomes were risk for metachronous large (≥1 cm) SPs and ANs (≥1 cm, villous elements, high-grade dysplasia, or colorectal cancer [CRC]). Individuals were hierarchically stratified by the most significant index SP. The risks for adults with proximal 5- to 9-mm HPs at index examination were compared with individuals with index findings of large (≥1 cm) HPs or any SSPs or TSAs, nonsignificant HPs (<1 cm in rectosigmoid or <5 mm anywhere in colon), high-risk adenomas (AAs or ≥3 adenomas, no SPs), and low-risk adenomas (no SPs). We present absolute and adjusted risks of metachronous polyps from a regression model that included age, sex, body mass index, smoking, previous polyp history, family history of CRC, year of diagnosis, endoscopist SP detection rates, and months to surveillance examination.
RESULTS: A total of 8560 NHCR participants were included (44.8% women; average age, 59.0 years; standard deviation, 9.1). Similar to those with large HPs or any SSPs/TSAs at index examination (odds ratio, 7.63; 95% confidence interval, 4.78-12.20), individuals with proximal 5- to 9-mm HPs had an elevated risk for metachronous large SPs (odds ratio, 4.77; 95% confidence interval, 2.54-8.94) as compared with adults with low-risk conventional adenomas.
CONCLUSIONS: NHCR data suggest that similar to adults with large HPs or any SSPs or TSAs at index examination, individuals with index 5- to 9-mm HPs proximal to the sigmoid are at an increased risk for metachronous large SPs. These novel data suggest that close surveillance intervals may be appropriate for patients with 5- to 9-mm proximal HPs.
METHODS: We included adults with at least 1 polyp resected at index colonoscopy and a surveillance examination 12 months or more after index. Outcomes were risk for metachronous large (≥1 cm) SPs and ANs (≥1 cm, villous elements, high-grade dysplasia, or colorectal cancer [CRC]). Individuals were hierarchically stratified by the most significant index SP. The risks for adults with proximal 5- to 9-mm HPs at index examination were compared with individuals with index findings of large (≥1 cm) HPs or any SSPs or TSAs, nonsignificant HPs (<1 cm in rectosigmoid or <5 mm anywhere in colon), high-risk adenomas (AAs or ≥3 adenomas, no SPs), and low-risk adenomas (no SPs). We present absolute and adjusted risks of metachronous polyps from a regression model that included age, sex, body mass index, smoking, previous polyp history, family history of CRC, year of diagnosis, endoscopist SP detection rates, and months to surveillance examination.
RESULTS: A total of 8560 NHCR participants were included (44.8% women; average age, 59.0 years; standard deviation, 9.1). Similar to those with large HPs or any SSPs/TSAs at index examination (odds ratio, 7.63; 95% confidence interval, 4.78-12.20), individuals with proximal 5- to 9-mm HPs had an elevated risk for metachronous large SPs (odds ratio, 4.77; 95% confidence interval, 2.54-8.94) as compared with adults with low-risk conventional adenomas.
CONCLUSIONS: NHCR data suggest that similar to adults with large HPs or any SSPs or TSAs at index examination, individuals with index 5- to 9-mm HPs proximal to the sigmoid are at an increased risk for metachronous large SPs. These novel data suggest that close surveillance intervals may be appropriate for patients with 5- to 9-mm proximal HPs.