Studies in recent years have shown colorectal cancer rates on the rise among adults younger than 50. The new paper showed that rates among adults ages 50 to 64 also increased between 2013 and 2022 and that rates of rectal cancer in particular climbed among all ages combined after years of decline. (Freepik) By NINA AGRAWAL Nearly half of all new colorectal cancer cases now occur in adults younger than 65, signaling a major shift in the demographics of the disease, according t