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Previous Volume 349:2261-2264 December 4, 2003 Number 23 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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Many professional societies in the United States recommend screening for colorectal cancer in asymptomatic, average-risk adults, beginning at 50 years of age. Screening achieves two goals: the detection of early-stage nonmetastatic cancers that are surgically curable and the identification and removal of benign adenomatous polyps, the precursor lesions of nearly all adenocarcinomas. Several approaches to screening are available, ranging from the least expensive and least invasive, fecal occult-blood testing, to the more costly and invasive procedures — flexible sigmoidoscopy, barium enema, and colonoscopy. Each of these tests has inherent strengths and weaknesses related to cost, risk, sensitivity, specificity, and availability.¹

. . . [Full Text of this Article]

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From the Department of Radiology (M.M.M.) and the Division of Gastroenterology (J.T.L.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston.

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