Colon and rectal cancers have increased dramatically and steadily in young and middle-age adults in the United States over the past four decades, a study confirmed Tuesday.
While scientists have not pinpointed an exact cause, prime suspects include obesity, inactivity and poor diets, said researchers from the American Cancer Society, reporting in the Journal of the National Cancer Institute.
“Colorectal cancer had been thought a success story” because overall rates have fallen as screening has increased among older adults, said lead researcher Rebecca Siegel. “But it appears that under the surface, the underlying risk for colorectal cancer is rising, and it is rising pretty quickly among young adults.”
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