A sigmoidoscopy is often used as a screening procedure for a full colonoscopy, often done in conjunction with a fecal occult blood test ( FOBT ).
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Prompted by the research results, federal health agencies on Tuesday announced a new campaign to encourage all Americans over 50 to take the fecal occult blood test.
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If colon cancer is suspected in an individual ( such as in someone with an unexplained anemia ) fecal occult blood tests may not be clinically helpful.
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The study began in 1975, nearly a decade after the fecal occult blood test was discovered but before anyone knew if it was effective in screening for colon cancer.
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The lack of false positives is important because patients who receive a positive result in the current occult blood test must then undergo colonoscopy, an expensive and invasive procedure.
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Giving up mammograms or the fecal occult blood test for colon cancer would cost the average 75-year-old only nine days of life, Black reported in last month's journal Effective Clinical Practice.
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The test, known as fecal occult blood screening, looks for traces of blood in people's stool, a possible sign of a cancer or benign polyps that can be precursors to cancer.
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But the study of 46, 000 people in Minnesota over a 20-year period showed 33 percent fewer deaths from colon cancer in those who had a yearly fecal occult blood test.
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_Colorectal cancer screening for Medicare beneficiaries age 50 and older, including a fecal occult blood test every 12 months and screening by scoping with a flexible tube once every 48 months.
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Men and women : height and weight, blood pressure, fecal occult blood test and / or sigmoidoscopy, vision screening, assess for hearing impairment, assess for problem drinking, pneumococcal vaccine, influenza, tetanus-diphtheria boosters.
