Physicians should screen for colorectal cancer in asymptomatic, low-risk adults aged 50 to 74 years every two years using fecal occult blood testing (FOBT), or flexible sigmoidoscopy every 10 years, rather than colonoscopy, ...
Feb 22, 2016
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The most dreaded part of a colonoscopy is prepping for it. The day before the exam, patients often drink large amounts of a vile-tasting liquid, then it's off to the throne for the better part of the day and night.
Nov 22, 2012
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DEAR MAYO CLINIC: I'm 46 and had my first colonoscopy last month. The doctor said everything looked good, although he removed a few polyps. Can you explain what a colon polyp is and if should I be concerned?
Apr 25, 2022
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Starting Monday, millions of people who have avoided colon cancer screenings can get a new home test that's noninvasive and doesn't require the icky preparation most other methods do.
Oct 26, 2014
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Dear Mayo Clinic: I just turned 50, and my health care provider recommends that I get a colonoscopy to screen for colon cancer. I want to have the test done, but as a recovering addict, I don't want pain medication. Is this ...
Aug 31, 2018
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(HealthDay)—Doctors may be performing too many repeat colonoscopies on people who've had pre-cancerous polyps removed during an earlier colon cancer screening, a new Norwegian study suggests.
Aug 27, 2014
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In the most comprehensive look yet at the safety of abortion, researchers at UC San Francisco have concluded that major complications are rare, occurring less than a quarter of a percent of the time, about the same frequency ...
Dec 8, 2014
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(HealthDay)—Tests for blood in the stool can consistently detect colon cancer when used on an annual basis, and they are effective even in the second, third and fourth years of screening, a new study says.
Jan 26, 2016
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Colorectal cancer will claim the lives of close to 50,000 Americans this year, according to the American Cancer Society. Screening is the most effective way to reduce the risk of dying from the disease, yet as a Penn Medicine ...
Oct 2, 2015
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Artificial intelligence reduced by twofold the rate at which precancerous polyps were missed in colorectal cancer screening, reported a team of international researchers led by Mayo Clinic. The study is published in Gastroenterology.
Apr 18, 2022
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Colonoscopy is the endoscopic examination of the large colon and the distal part of the small bowel with a CCD camera or a fiber optic camera on a flexible tube passed through the anus. It may provide a visual diagnosis (e.g. ulceration, polyps) and grants the opportunity for biopsy or removal of suspected lesions.
Virtual colonoscopy, which uses 2D and 3D imagery reconstructed from computed tomography (CT) scans or from nuclear magnetic resonance (MR) scans, is also possible, as a totally non-invasive medical test, although it is not standard and still under investigation regarding its diagnostic abilities. Furthermore, virtual colonoscopy does not allow for therapeutic maneuvers such as polyp/tumor removal or biopsy nor visualization of lesions smaller than 5 millimeters. If a growth or polyp is detected using CT colonography, a standard colonoscopy would still need to be performed.
Colonoscopy can remove polyps as small as one millimeter or less. Once polyps are removed, they can be studied with the aid of a microscope to determine if they are precancerous or not.
Colonoscopy is similar to but not the same as sigmoidoscopy, the difference being related to which parts of the colon each can examine. While colonoscopy allows an examination of the entire colon (measuring four to five feet in length), sigmoidoscopy allows doctors to view only the final two feet of the colon. A sigmoidoscopy is often used as a screening procedure for a full colonoscopy, in many instances in conjunction with a fecal occult blood test (FOBT), which can detect the formation of cancerous cells throughout the colon. Other times, a sigmoidoscopy is preferred to a full colonoscopy in patients having an active flare of ulcerative colitis or Crohn's disease to avoid perforation of the colon. Additionally, surgeons have lately been using the term pouchoscopy to refer to a colonoscopy of the ileo-anal pouch.
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