“In past years, we’ve thought of colorectal cancer as a disease of aging,” said Joel Mason, a gastroenterologist and Senior Scientist at the Jean Mayer USDA Human Nutrition Research Center on Aging (HNRCA) at Tufts. “If you look at the absolute incidence rates, it’s still higher amongst older people, but the rate is going up steadily in young people, whereas it’s going down in older people. It’s a disturbing trend.”