Colorectal Cancer: Rising Rates in Younger Adults – ACS Report

The landscape of colorectal cancer in the United States is undergoing a significant shift, according to a new report released today by the American Cancer Society (ACS). While rates continue to decline in older adults, a concerning trend reveals rising incidence among individuals under 65, particularly younger adults. This divergence signals a change in who is most affected by this disease, prompting calls for increased research and preventative measures.

A Two-Track Trend in Colorectal Cancer

For decades, progress in colorectal cancer prevention and treatment led to declining rates overall. However, the ACS’s triennial Colorectal Cancer Statistics, 2026 report highlights a stark contrast. The increase in cases is largely driven by cancers located in the distal colon – the section closest to the rectum – and within the rectum itself. In fact, rectal cancer now accounts for nearly one-third (32%) of all colorectal cancer diagnoses, up from 27% in the mid-2000s. The findings were published in CA: A Cancer Journal for Clinicians.

Rebecca Siegel, senior scientific director of surveillance research at the ACS and lead author of the report, emphasized the urgency of the situation. “After decades of progress, the risk of dying from colorectal cancer is climbing in younger generations of men and women, confirming a real uptick in disease because of something we’re doing or some other exposure,” she stated. The report underscores the need to understand the underlying causes of this shift and to improve early detection efforts.

Understanding Colorectal Cancer

Colorectal cancer encompasses cancers that originate in the colon or rectum. These cancers often develop from precancerous polyps, which can be detected and removed during screening procedures like colonoscopies. Early detection is crucial, as it allows for more effective treatment and improved outcomes. The American Cancer Society provides detailed information on colorectal cancer, including risk factors, symptoms, and screening guidelines.

The Rise in Younger Adults: A Growing Concern

The increase in colorectal cancer cases among younger adults is particularly alarming. The Colorectal Cancer Alliance (Alliance) has also drawn attention to this trend, noting that colorectal cancer is now the leading cause of cancer-related death among adults under 50. According to data released in January 2026, almost 60 Americans in their 40s or younger are diagnosed with colorectal cancer each day – roughly one diagnosis every 25 minutes. This represents a significant increase from previous years and is projected to rise by 90 percent by 2030. The Alliance is actively working to address this issue through awareness campaigns, screening education, and research initiatives like Project Cure CRC.

This shift is especially concerning because screening rates are lower in this age group. Currently, only 37% of individuals are undergoing recommended colorectal cancer screenings. Three out of four colorectal cancers diagnosed in adults under 50 are found at an advanced stage, making treatment more challenging.

What Drives the Increase in Younger Adults?

The exact reasons for the rising incidence of colorectal cancer in younger adults remain unclear. Researchers are investigating a range of potential factors, including dietary changes, obesity, sedentary lifestyles, and alterations in the gut microbiome. It’s likely that a combination of these factors, along with possible environmental exposures, is contributing to the trend. The ACS report highlights the need for further research to pinpoint the specific causes and develop targeted prevention strategies.

Public Health Response and Screening Recommendations

The observed trends are prompting a reevaluation of current screening guidelines. Traditionally, screening recommendations began at age 50. However, given the increasing incidence in younger adults, some organizations are advocating for earlier screening. The U.S. Preventive Services Task Force (USPSTF) is currently reviewing its recommendations, and updates are expected in the coming years.

Increased awareness of symptoms is also crucial. Symptoms of colorectal cancer can include changes in bowel habits, rectal bleeding, abdominal discomfort, and unexplained weight loss. Individuals experiencing these symptoms should consult a healthcare professional promptly. It’s vital to note that these symptoms can also be caused by other conditions, but early evaluation is essential to rule out colorectal cancer.

What Comes Next: Surveillance and Research

The American Cancer Society and the Colorectal Cancer Alliance are committed to ongoing surveillance of colorectal cancer trends and to supporting research efforts aimed at understanding the disease and improving outcomes. Project Cure CRC, spearheaded by the Alliance, focuses on accelerating the development of cutting-edge treatments. Researchers are also exploring the potential of biomarkers – measurable indicators of disease – to improve early detection and personalize treatment strategies. Continued monitoring of incidence rates, mortality data, and screening patterns will be essential to track the effectiveness of these efforts and to adapt public health strategies as needed. The ACS report serves as a critical call to action, emphasizing the need for a concerted effort to reverse the troubling trend of rising colorectal cancer rates in younger adults.

For more information on colorectal cancer, including screening guidelines and risk factors, please consult the American Cancer Society or the Colorectal Cancer Alliance.