are polyps cancer in colon?
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Polyps in the colon or rectum Most colorectal cancers start as a growth on the inner lining of the colon or rectum. These growths are called polyps. Some types of polyps can change into cancer over time (usually many years), but not all polyps become cancer.
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What is a polyp in the colon? A polyp is a projection (growth) of tissue from the inner lining of the colon into the lumen (hollow center) of the colon. Different types of polyps look different under the microscope. Polyps are benign (non-cancerous) growths, but cancer can start in some types of polyps.
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Many times, people are not aware they have colon polyps because there are no symptoms. Larger growths can bleed, causing blood in the stool. Sometimes bleeding polyps can cause fatigue and other symptoms of anemia (low levels of red blood cells).
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A colon polyp is a small clump of cells that forms on the lining of the colon. Most colon polyps are harmless. But over time, some colon polyps can develop into colon cancer, which is often fatal when found in its later stages. There are two main categories of polyps, non-neoplastic and neoplastic.
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Polyps appear as lumps inside the colon. Some are flat and others hang down from a stalk. Each polyp is biopsied and tissue from the polyp is sent to a lab and tested for cancer. While it can be nerve-wracking waiting for the lab results, remember that it takes as many as 10 years for a polyp to become cancerous.
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Adenomatous (tubular adenoma) About 70 percent of all polyps are adenomatous, making it the most common type of colon polyp. When this type of polyp is found, it is tested for cancer. Only a small percentage actually become cancerous, but nearly all malignant polyps began as adenomatous.
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What does it mean if I have an adenoma (adenomatous polyp), such as a sessile serrated adenoma or traditional serrated adenoma? These types of polyps are not cancer, but they are pre-cancerous (meaning that they can turn into cancers).
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Polyps (abnormal growths of tissue protruding from the lining of the gastrointestinal tract) can occur in the small bowel and are usually benign, although some can develop into malignant tumors. Patients with rare hereditary conditions, such as Familial Polyposis Syndromes, may have multiple small bowel polyps.
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The large majority of polyps will not become cancers. Certain types of polyps are more likely to turn into cancer. Removal of polyps during a colonoscopy reduces the risk of developing colon cancer in the future.
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Colon cancer Healthy cells grow and divide in an orderly way. Mutations in certain genes can cause cells to continue dividing even when new cells aren't needed. In the colon and rectum, this unregulated growth can cause polyps to form. Polyps can develop anywhere in your large intestine.
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Treatments for Colon Polyps During a colonoscopy or flexible sigmoidoscopy, your doctor uses forceps or a wire loop to remove polyps. This is called a polypectomy. If the polyp is too large to take out this way, you may need surgery to remove it.
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Colon cancers develop from precancerous polyps that grow larger and eventually transform into cancer. It is believed to take about 10 years for a small precancerous polyp to grow into cancer.
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Doctors 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.
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Not all polyps will turn into cancer, and it may take many years for a polyp to become cancerous. Anyone can develop colon and rectal polyps, but people with the following risk factors are more likely to do so: Age 50 years and older. A family history of polyps or colon cancer.
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A polyp is a projection (growth) of tissue from the inner lining of the colon into the lumen (hollow center) of the colon. Different types of polyps look different under the microscope. Polyps are benign (non-cancerous) growths, but cancer can start in some types of polyps.
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You might not know you have a polyp until your doctor finds it during an examination of your bowel. But some people with colon polyps experience: Rectal bleeding. This can be a sign of colon polyps or cancer or other conditions, such as hemorrhoids or minor tears in your anus.
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Colorectal cancer types. Adenocarcinomas of the colon and rectum make up 95 percent of all colorectal cancer cases. In the gastrointestinal tract, rectal and colon adenocarcinomas develop in the cells of the lining inside the large intestine.