what percentage of colon polyps are cancerous

According to the search results, the percentage of colon polyps that are cancerous varies depending on the size of the polyp. Only 5-10% of all polyps will become cancerous, and the larger the polyp becomes, the bigger the risk of it developing into colon cancer. Approximately two-thirds of colon polyps are adenomas, which means 66% of all colon polyps are precancerous and could develop into colon cancer. The percentage of polyps that are cancerous, by size, was found to be 0.6% for polyps 1-5 mm in diameter, 2.1% for polyps 6-9 mm in diameter, and 13.4% for polyps 10 mm or larger. Another study found that the prevalence of cancerous polyps in series of endoscopically removed polyps is between 0.2% and 11% . Therefore, the percentage of colon polyps that are cancerous varies depending on the size of the polyp, with larger polyps having a higher risk of becoming cancerous.