Colorectal cancer and young people

Colorectal cancer incidence in youth

U.S. age-adjusted incidence rates per 100,000, ages 10–24, 1999–2020.

Source: CDC WONDER analysis published in 2026. The very low starting rates mean percentage increases can look dramatic even when the absolute number of cases remains small.

Colorectal cancer is traditionally thought of as a disease affecting older adults, but there has been a concerning trend of increasing incidence among young people in recent years. While the exact reasons for this trend are not fully understood, several factors have been proposed as potential contributors.

1. Diet and Lifestyle Changes: Poor dietary habits, including high consumption of processed foods, red meat, and sugary drinks, along with low intake of fruits, vegetables, and fibre, have been associated with an increased risk of colorectal cancer. Sedentary lifestyles and obesity are also risk factors.

2. Environmental Exposures: Some researchers suggest that exposure to environmental factors, such as air pollution, industrial chemicals, and pesticides, may play a role in the development of colorectal cancer. However, more research is needed to understand the specific mechanisms involved.

3. Changes in Gut Microbiota: Alterations in the gut microbiota, the diverse community of microorganisms that inhabit the digestive tract, have been linked to colorectal cancer. Factors such as antibiotic use, diet, and lifestyle may influence the composition of the gut microbiota and contribute to cancer development.

4. Screening Guidelines: Changes in screening guidelines may also be contributing to the observed increase in colorectal cancer among young people. While routine screening for colorectal cancer is recommended for adults aged 50 and older, recent studies suggest that early-onset colorectal cancer may be missed in younger individuals who are not routinely screened.

5. Genetic and Familial Factors: In some cases, early-onset colorectal cancer may be due to inherited genetic mutations or a family history of the disease. Individuals with a family history of colorectal cancer or certain genetic syndromes, such as Lynch syndrome or familial adenomatous polyposis (FAP), may be at increased risk.

Addressing the rising incidence of colorectal cancer among young people requires a multifaceted approach, including efforts to promote healthy lifestyle habits, raise awareness about the importance of early detection and screening, and further research into the underlying causes of the disease. By addressing these factors, it may be possible to reduce the burden of colorectal cancer in younger populations.

Source: Some or all of the content was generated using an AI language model