evidence: While some cancers have been declining in older people, various reports and studies have shown that cancer is on the rise in younger adults. One recent large study, published in The Lancet Public Health in July 2024, analyzed differences among adults born in the U.S. between 1920 and 1999, and found incidence rates rose in successively younger generations—particularly in Generation Xers and Millennials—in 17 of 34 cancer types, including breast, pancreatic, and gastric cancers. Mortality rates for several types of cancers increased as well. The study was led by the American Cancer Society (ACS). [...] The ACS annual report also showed continued increases in such common cancers as breast, prostate, and endometrial in young adults, as well as colorectal and cervical cancers. Colorectal cancer, while still overwhelmingly a disease that affects older people, is now the leading cause of cancer death in men younger than 50 and second in women in that age group. The numbers have been rising steadily in people 55 and younger since the mid-1990s, according to the ACS.