Colorectal Cancer Screening: Why 45 Could Be the Novel 50
Canada is on the cusp of a significant shift in colorectal cancer screening recommendations. The Canadian Cancer Society (CCS) is urging provincial and territorial governments to lower the age for routine screening from 50 to 45, citing a worrying rise in diagnoses among younger adults.
A Generational Shift in Colorectal Cancer Rates
For decades, 50 has been the standard age to begin regular colorectal cancer screening. However, data reveals a concerning trend: individuals born after 1980 are now two to 2.5 times more likely to be diagnosed with colorectal cancer before age 50 compared to previous generations. Dr. Darren Brenner, a cancer epidemiologist at the University of Calgary, highlights the stark reality: those born around 1988 have a 2.3 times higher rate of diagnosis than those born in 1958, and for the youngest diagnosed, the rate is even higher at 2.7 times.
The Power of Early Detection: From Prevention to Cost Savings
Lowering the screening age isn’t just about identifying cancer sooner; it’s about preventing it. Colorectal cancer screening, typically involving a fecal immunochemical test (FIT) – a stool sample analysis – can detect precancerous lesions during a colonoscopy. These lesions can then be removed before they develop into full-blown cancer. A recent modelling study published in the Journal of the Canadian Association of Gastroenterology predicts that lowering the screening age to 45 could result in 15,000 fewer colorectal cancer cases and 6,100 fewer deaths over the next 45 years.
Beyond the human impact, early detection also offers potential economic benefits. The study suggests a potential savings of $233 million for Canada’s public health system over the lifespan of newly eligible patients, as the costs associated with treating advanced-stage cancer are significantly higher than those of preventative screening and early intervention.
Navigating a Changing Landscape of Cancer Screening Guidelines
The CCS’s call to action comes at a pivotal moment. Ottawa recently shut down the Canadian Task Force on Preventive Health Care following controversy over its recommendations on mammogram screening ages. A modernized task force, informed by a report led by University of Waterloo president Vivek Goel, is expected to launch next month. The previous task force’s guidance, last updated in 2016, recommended screening average-risk Canadians aged 50-74 every two years with a stool test or flexible sigmoidoscopy.
What’s Driving the Rise in Younger Cases?
While the exact causes of this increase remain under investigation, preliminary research points to several potential factors. Changes in the gut microbiome, potentially linked to modern diets high in ultra-processed foods, lack of exercise, high alcohol intake, early exposure to antibiotics, and other environmental factors are being explored.
The Future of Colorectal Cancer Screening in Canada
Monika Krzyzanowska, chief of the Odette Cancer Program at Sunnybrook Health Sciences Centre in Toronto, supports lowering the screening age, stating, “Hopefully we’ll pick up cancer at an earlier stage, where you can intervene and hopefully receive rid of the cancer.” The CCS hopes provincial and territorial governments will heed their call and implement the change, potentially saving lives and reducing the burden of this increasingly prevalent disease.
Frequently Asked Questions
- What is a FIT test?
- A fecal immunochemical test (FIT) is a simple, at-home stool sample test that checks for hidden blood in your stool, which can be a sign of colorectal cancer or precancerous polyps.
- How often should I be screened?
- Currently, guidelines recommend screening every two years for individuals aged 50-74. The CCS is advocating for this to begin at age 45.
- What happens if my FIT test is positive?
- A positive FIT test doesn’t necessarily mean you have cancer, but it does mean you’ll necessitate a colonoscopy to investigate further.
- Is colorectal cancer screening covered by provincial health plans?
- Most provinces and territories have organized colorectal cancer screening programs that are covered by public health insurance.
Want to learn more? Explore the Canadian Cancer Society’s colorectal cancer information page for detailed resources, and support.
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