According to a new report from the American Cancer Society, rates of colorectal cancer - commonly called colon cancer - are decreasing steeply among older people in the US because of increasing use of colonoscopy screening, which can detect and remove precancerous growths.Over the last 10 years in the US, colon cancer incidence rates have fallen by 30% among people aged 50 and over, with the largest fall in those over 65.Meanwhile, use of colonoscopy screening has nearly tripled among those aged 50 to 75 - from 19% in 2000 to 55% in 2010.

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