Tag Archives: colonoscopy

Finding Polyps Missed During Colonoscopies for Lynch Syndrome

Lynch syndrome (also known as hereditary nonpolyposis colon cancer) greatly increases the risk for colon and rectal cancer. People with the gene have about an 8 in 10 chance of getting colon cancer during their lives. Because Lynch cancers develop quickly and grow rapidly, it’s important to monitor people who carry the genes closely with colonoscopy every year or two. When doctors in four research centers immediately followed up Lynch syndrome patients after a regular colonoscopy with more intense colonoscopy scrutiny, they discovered they had missed more polyps than they found.  During the first exam, their miss rate for adenomas, polyps with the greatest risk of developing into cancer, was

Positive FOBT Should Trigger Colonoscopy

Even if a patient had a previous clear colonoscopy or all polyps seen on that exam were removed, a new positive fecal occult blood test (FOBT) calls for a repeat colonoscopy. After 21,600 clear colonoscopies done at the Veterans Administration Medical Center in Phoenix, 57 patients needed a second colonoscopy after they had a positive FOBT for blood in their stool. Of those one-third (19) had a newly discovered adenomatous polyp and 3 had colon or rectal cancer.  One in four of the new adenomas were advanced.

Improved Colonoscope Finds More Polyps

Doctors using a new optical device mounted on the end of their scopes, found significantly more polyps in the colon during routine colonoscopies.  Called the Third Eye Retroscope™, it lets gastroenterologists see both forward and backward as the scope moves through the colon. Although colonoscopy is extremely sensitive and will discover most colon polyps during an exam, some are missed.  They may be hidden in the back side of folds in the colon wall or not seen because they are outside of the half circle view of the standard colonoscope.   The wider view allowed doctors to find 13 percent more polyps and 10 percent more adenomatous polyps, the ones more

New Technique Provides Microscopic Images of Suspicious Polyps During Colonoscopy

News from Digestive Disease Week 2008 A tiny microscope, less than one-sixteenth of an inch, attached to the end of the instrument used for a colonoscopy can provide magnified pictures of cells and small blood vessels in suspicious lesions allowing doctors to make on-the-spot decisions about whether a polyp is benign or precancerous. The technique — confocal endomicroscopy — can identify benign polyps 98 percent of the time, avoiding having to remove the lesion and wait for results of the biopsy.  Precancerous polyps can be viewed, identified, and treated immediately during the colonoscopy.

First Colonoscopy of the Day Finds More Polyps

News from Digestive Disease Week 2008 Video courtesy of Medscape Today. The first colonoscopy performed each day finds more polyps — both small hyperplastic ones and more serious advanced adenomas.  As the day goes on, fewer polyps are found every hour. Researchers studied all the colonoscopies performed at the UCLA Veteran Administration Center in 2006 and 2007, keeping track of a number of variables that might affect the number of polyps found.  Even adjusting for patient differences, withdrawal times, and bowel preparation, the time of day remained a predictor of how many polyps were located during the colonoscopy.

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