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40% of Cancers Are Linked to Being Overweight

40% of Cancers Are Linked to Being Overweight
From TIME - October 5, 2017

The rate of new cancer cases has decreased in the United States since the 1990s. But increases in overweight- and obesity-related cancerswhich now account for 40% of all U.S. cancersare likely slowing that progress, according to a new report from the Centers for Disease Control and Prevention (CDC).

In 2014, about 630,000 Americans were diagnosed with a cancer associated with excess body weight. Based on a review of more than 1,000 studies, the International Agency for Research on Cancer has identified 13 such cancers: esophageal, colorectal, endometrial, gallbladder, stomach, kidney, liver, ovarian, pancreatic, thyroid and postmenopausal breast cancers, as well as meningioma and multiple myeloma.

The new analysis, published in the CDCs Morbidity and Mortality Weekly Report, reviewed data from 2005 to 2014 on cancer rates in the United States. During that time, the rates of non-obesity-related cancers declined by 13%.

Rates of colorectal cancer diagnosis also declined from 2005 to 2014, likely because an increase in screenings has allowed for more abnormal growths to be found and removed before developing into full-blown cancer. When colorectal cancer rates were removed from the equation, however, the rate of other obesity-related cancers increased by 7%.

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