Screening for Colorectal Cancer

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Abstract
GOLORECTAL cancer is a leading cause of death from cancer in the United States, with approximately 140,000 new cases and 60,000 deaths per year.1 A 50-year-old person has about a 5 percent risk of having colorectal cancer by the age of 80 and a 2.5 percent risk of dying from it.2 To reduce the morbidity and mortality due to colorectal cancer, some professional organizations have proposed that asymptomatic persons without known risk factors be screened to detect cancer at a curable stage.3 4 5 The rationale for screening is based on the widely held view6 that most colorectal cancers are the product . . .