What are colon polyps?
Colon polyps are clumps of cells on the lining of the large intestine. The key type is the adenoma, which can progress to cancer over roughly 10 years (the adenoma–carcinoma sequence). Small hyperplastic polyps rarely become cancer, while sessile serrated lesions carry real risk.
Does removing polyps prevent cancer?
Yes. In the National Polyp Study, people who had adenomas removed developed 76–90% fewer colorectal cancers than expected (Winawer et al., 1993). Polyps rarely cause symptoms, and bleeding can be mistaken for hemorrhoids, which is why the US Preventive Services Task Force recommends screening from age 45.
When is the next colonoscopy?
The US Multi-Society Task Force (Gupta et al., 2020) suggests 7–10 years after 1–2 small adenomas, 3–5 years for 3–4, and 3 years for 5–10 adenomas, any 10 mm or larger, or high-risk features. Not smoking, limiting alcohol and processed meat, staying active and keeping a healthy weight lower risk.
This article is general health information and is not a substitute for diagnosis or treatment. If symptoms persist, see a doctor.
FAQ
- Does a polyp mean I have cancer?
- No. Most polyps are benign, and removing them is how cancer is prevented.
- Is a stool test enough?
- FIT or stool DNA tests are valid screening options, but a positive result needs a colonoscopy.
Sources reviewed: 2026-10-25
References
- Winawer, S. J., Zauber, A. G., Ho, M. N., et al. (1993). Prevention of colorectal cancer by colonoscopic polypectomy. New England Journal of Medicine, 329(27), 1977–1981.
- Gupta, S., Lieberman, D., Anderson, J. C., et al. (2020). Recommendations for follow-up after colonoscopy and polypectomy: US Multi-Society Task Force. Gastroenterology, 158(4), 1131–1153.