What is a malignant colon polyp?
A malignant polyp is a colon or rectal growth that has been entirely or partially removed with colonoscopy that contains cancer cells.
What percentage of colon polyps are malignant?
Approximately 1% of polyps with a diameter less than 1 centimeter (cm) are cancerous. If you have more than one polyp or the polyp is 1 cm or bigger, you’re considered at higher risk for colon cancer. Up to 50% of polyps greater than 2 cm (about the diameter of a nickel) are cancerous.
What type of colon polyp is most likely to become malignant?
Villous Adenoma (Tubulovillous Adenoma) Approximately 15 percent of polyps detected in colon cancer screening are villous or tubulovillous adenomas. This type of polyp carries a high risk of turning cancerous. They are commonly sessile, which makes them more difficult to remove.
How are malignant polyps classified in colorectal cancer?
Nowadays, the number of cases in which malignant colorectal polyps are removed is increasing due to colorectal cancer screening programmes. Cancerous polyps are classified into non-invasive high grade neoplasia (NHGN), when the cancer has not reached the muscularis mucosa, and malignant polyps, clas …
What to do with a malignant colon polyp?
A malignant polyp is a colon or rectal growth that has been entirely or partially removed with colonoscopy that contains cancer cells. What to do first? First and foremost, it is important to remember that this is a cancer and it should be staged appropriately.
What are the Haggitt levels for colorectal polyps?
1 Haggitt levels 1-3 or Sm level 1 2 Well-differentiated histology 3 No lymphovascular invasion 4 Single resection (non-piecemeal) with a negative margin More
What should be the resection margin for colon polyps?
This ranges from 0% to 2% in malignant polyps with a margin of resection greater than 1 mm. However, when the resection margin is involved, or < 1 mm, the percentage of relapse ranges between 21% and 33%. Subsequently, many authors believe that a resection margin of ≥ 2 mm is ideal[2].