A colon polyp is a small growth that can develop anywhere in the large intestine. Colon polyps are often precancerous, but unlike other precancerous indicators in the body, they can easily be removed as they are found during a colonoscopy — a cancer screening that internally examines the entire length of your large intestine. To underscore the importance of a screening colonoscopy, consider this — for men and women combined, colon cancer is the second leading cause of cancer death. According to the American Cancer Society, more than 52,000 Americans are expected to die this year alone from colon cancer. "The only difference between someone living and dying from colon cancer is when — at what point in their life — they get their colonoscopy," Dr. Sand said. "Colonoscopy really can save your life." What to know about colon polypsDoctors don't know why colon polyps form, and not every type of polyp is considered precancerous. However, two-thirds of polyps found through colonoscopy are likely precancerous, Dr. Sand said. These are called adenomas, and once they are painlessly removed through colonoscopy, they present no further risk to the patient. Did you know?
After television personality Katie Couric's husband died from colon cancer in 1998, Couric was determined to make screening a familiar, commonplace occurrence for everyone in the U.S. because it would save lives. Since around the turn of the 21st century, traditional colonoscopy has been the gold standard for colon cancer screening. Although there are other types of screening, only traditional colonoscopy allows for the removal of polyps during the procedure. DiagnosisScreening tests play a key role in detecting polyps before they become cancerous. These tests can also help find colorectal cancer in its early stages, when you have a good chance of recovery. Screening methods include:
Mayo Clinic Minute: What you need to know about polyps in your colon"Generally speaking, we encourage all adults over the age of 50 – and even older adults who have at least 10 years of very high-quality life expectancy – to participate in screening," Dr. Kisiel says. He says you might be surprised how often colonoscopies uncover polyps lurking in your colon. "Precancerous polyps are extremely common," he says. "We expect to find them in more than a quarter of the colonoscopies that we do at a minimum. So, you know, maybe a third or even a half of all patients getting [a] colonoscopy will have precancerous polyps." Although 1 in 20 Americans will be diagnosed with colorectal cancer in his or her lifetime, Dr. Kisiel says having polyps does not necessarily mean you will get cancer. "Of all the polyps that we see, only a minority will turn into cancer," he says. "Sometimes they just go away on their own, but removing polyps is thought to be one of the mechanisms by which we can prevent the formation of cancer in the first place." That's why regular screening is so important. The downside is that if a polyp is found in your colon, you may have to get screened more frequently. But that's certainly better than having to go through treatment for colorectal cancer. More Information
TreatmentYour doctor is likely to remove all polyps discovered during a bowel examination. The options for removal include:
Some types of colon polyps are more likely to become cancerous than others. A doctor who specializes in analyzing tissue samples (pathologist) will examine your polyp tissue under a microscope to determine whether it is potentially cancerous. Follow-up careIf you have had an adenomatous polyp or a serrated polyp, you are at increased risk of colon cancer. The level of risk depends on the size, number and characteristics of the adenomatous polyps that were removed. You'll need follow-up screenings for polyps. Your doctor is likely to recommend a colonoscopy:
Preparing for your colonoscopyIt's very important to fully prepare (clean out) your colon before a colonoscopy. If stool remains in the colon and obstructs your doctor's view of the colon wall, you will likely need a follow-up colonoscopy sooner than usual to ensure that all polyps are discovered. After a good colon preparation, bowel movements should appear as clear liquid, which may be slightly yellow or green-tinged, depending on the color of any liquids consumed during the preparation. If you experience trouble with your colon preparation, or feel that you have not been cleaned out by the preparation, you should discuss this with your doctor before beginning your colonoscopy, as some people require additional steps in preparation before attempting colonoscopy. Subscribe for free and receive your in-depth guide to digestive health, plus the latest on health innovations and news. You can unsubscribe at any time. To provide you with the most relevant and helpful information,
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communications at any time by clicking on the unsubscribe link in the e-mail. Clinical trialsExplore Mayo Clinic studies testing new treatments, interventions and tests as a means to prevent, detect, treat or manage this condition. Preparing for your appointmentYou may be referred to a doctor who specializes in digestive diseases (gastroenterologist). What you can do
Questions to ask your doctor
In addition to the questions that you've prepared to ask your doctor, don't hesitate to ask other questions during your appointment. What to expect from your doctorYour doctor is likely to ask you a number of questions. Being ready to answer them may leave time to go over points you want to spend more time on. You may be asked:
Does having cancerous polyps mean you have cancer?These polyps have the potential to become cancer if given enough time to grow. Most of these colon polyps are called adenomas. Serrated polyps may also become cancerous, depending on their size and location in the colon. In general, the larger a polyp, the greater the risk of cancer, especially with neoplastic polyps.
What is the treatment for a cancerous colon polyp?Larger polyps might be removed during colonoscopy using special tools to remove the polyp and a small amount of the inner lining of the colon in a procedure called an endoscopic mucosal resection. Minimally invasive surgery (laparoscopic surgery).
What happens if a polyp that is removed contains cancer NHS?Occasionally, when we examine the polyp we remove, we find that we did not get all of it or that the polyp has cancerous cells in it. If this does happen, then we will need to do a second colonoscopy or an operation to ensure that any abnormal tissue is completely removed.
Can you get colon cancer after having polyps removed?For people with advanced polyps, the study showed that cancer risk is not just in the first years after the polyp was removed, but the risk remained elevated throughout the ensuing 15 years.
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