Surge in Colorectal Cancer Diagnoses Among Younger Americans
Recent updates to cancer screening guidelines have led to a notable rise in colorectal cancer (CRC) cases among younger individuals in the United States. A pair of studies conducted by the American Cancer Society (ACS) reveals a significant increase in diagnoses among people aged 45 to 49.
Research shows a dramatic jump in local-stage colorectal cancer diagnoses from 2019 to 2022, marking a 50% rise from 2021 to 2022. Elizabeth Schafer, an associate scientist at the ACS, suggests this uptick is encouraging, likely resulting from new recommendations encouraging adults at average risk to start screening earlier.
In 2018, the ACS adjusted the recommended screening age from 50 to 45. This recommendation was echoed by the United States Preventive Services Task Force in 2021.
A study published in the Journal of the American Medical Association (JAMA) reviewed CRC cases from 2004 to 2022 among 20- to 54-year-olds. It found that diagnoses in the 20 to 39 age bracket have been rising steadily at 1.6% annually since 2004. However, for those aged 45 to 49, the annual increase accelerated to 12% from 2019 to 2022.
The ACS noted that the increase was mainly due to more local-stage tumors being detected, which rose nearly 19% each year for colon cancer, and over 25% for rectal cancer during the same period. Prior to this, detection rates for colon and rectal cancers had been stable or declining.
Further findings showed that advanced-stage disease also rose significantly, increasing from 1.7% to 2.9% annually since 2004 among adults under 45. Notably, CRC screening among adults aged 45 to 49 jumped by 62% from 2019 to 2023, with screenings rising from 20% to 37%. Specifically, colonoscopy rates increased by 43%, and stool-based testing saw more than a five-fold increase.
Jessica Star, an associate scientist at ACS, expressed optimism about the increase in screening rates among younger adults, linking it to earlier stage diagnoses. However, she emphasized that access to screening is still inadequate, and disparities remain based on education and insurance status.
Dr. Paul E. Oberstein, a medical oncologist, highlighted that increased screening can help detect cancers at early stages, significantly improving the chances of successful treatment. He urged a focus on understanding why colorectal cancer rates are increasing, particularly among younger populations.
While the overall rate of colon cancer remains lower in those under 45, experts suggest that some individuals with a family history or risk factors may benefit from earlier screening. Dr. Craig Eagle pointed out the importance of early detection, noting that the five-year survival rate for CRC is over 90% when diagnosed early, but drops dramatically once the disease advances.
As the rates of colorectal cancer continue to rise in younger individuals, experts recommend that anyone experiencing concerning symptoms consult a doctor promptly.
