Five-year risk of colorectal neoplasia after negative screening colonoscopy

Thomas F. Imperiale, Elizabeth A. Glowinski, Ching Lin-Cooper, Gregory N. Larkin, James D. Rogge, David F. Ransohoff

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196 Scopus citations

Abstract

BACKGROUND: The appropriate interval for endoscopic rescreening after a negative colonoscopic examination is uncertain. METHODS: We identified persons with no adenomas on baseline screening colonoscopy who returned at 5 years for follow-up colonoscopy. Findings were categorized according to the most advanced lesion present: no polyp, a hyperplastic polyp, a tubular adenoma less than 1 cm in diameter, an advanced adenoma (a tubular adenoma ≥1 cm in diameter or a polyp with villous histologic features or high-grade dysplasia), or a cancer. RESULTS: Baseline screening colonoscopy had identified 2436 persons with no adenomas; 1256 of them (51.6%) were rescreened a mean (±SD) of 5.34±1.34 years later. The mean age of this group at baseline was 56.7 years; 56.7% of its members were men. No cancers were found on rescreening (95% confidence interval [CI] for the detection rate, 0 to 0.24%). One or more adenomas were found in 201 persons (16.0%). A total of 19 advanced adenomas, of which 10 (52.6%) were distal to the splenic flexure, were found in 16 persons (1.3%). The risk of an advanced adenoma did not differ significantly between persons with no polyps at baseline and those with hyperplastic polyps at baseline (1.1% [12 of 1057] and 2.0% [4 of 199], respectively; P=0.30). Men were more likely than women to have any adenoma (tubular less than 1 cm in diameter or advanced) (relative risk, 1.88; 95% CI, 1.42 to 2.51) and to have an advanced adenoma (relative risk, 3.31; 95% CI, 1.02 to 10.8). CONCLUSIONS: Among persons with no colorectal neoplasia on initial screening colonoscopy, the 5-year risk of colorectal cancer is extremely low. The risk of advanced adenoma is also low, although it is higher among men than among women. Our findings support a rescreening interval of 5 years or longer after a normal colonoscopic examination.

Original languageEnglish (US)
Pages (from-to)1218-1224
Number of pages7
JournalNew England Journal of Medicine
Volume359
Issue number12
DOIs
StatePublished - Sep 18 2008

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ASJC Scopus subject areas

  • Medicine(all)

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Imperiale, T. F., Glowinski, E. A., Lin-Cooper, C., Larkin, G. N., Rogge, J. D., & Ransohoff, D. F. (2008). Five-year risk of colorectal neoplasia after negative screening colonoscopy. New England Journal of Medicine, 359(12), 1218-1224. https://doi.org/10.1056/NEJMoa0803597