Colorectal cancer is rising in younger adults at an alarming pace, with some patients being diagnosed in their thirties despite having no family history of the disease. Credit: Shutterstock Colorectal cancer rates are falling among older adults, largely because of increased screening. But researchers are seeing a troubling shift in younger people, with more cases now appearing in adults under 50, including some in their thirties. A new nationwide study from Switzerland found that diagnoses in