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Colorectal cancer (CRC) was the third-leading cause of cancer death in Taiwan in 2008. The natural history of CRC provides a chance for screening and prevention. Most CRC develops from adenomatous polyps. This progression takes at least 10 years in most people. About 90% of CRC develops after 50 years of age. Screening tests can identify cancers, usually at an early stage, and polyps, which can be...
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