Bowel Cancer

Talking about bowel cancer isn't easy but understanding it could save your life.

In Ireland, bowel cancer is one of the most common cancers for both men and women.  It usually starts as small polyps in the colon or rectum.  While most polyps are harmless, some can turn into cancer over time.  Screening is the best way to catch or prevent it, even when you feel completely healthy.

Why early screening makes such a difference:

Find it early

Screening can detect cancer when it’s most treatable.

Stop it before it starts

Screening can find and remove precancerous polyps.

How Common Is It?

In Ireland over 2,500 cases are diagnosed each year: 1,500 men and 1,000 women1.  Globally it is the third most common cancer diagnosed each year.

Top five most common cancers during 2020-2022

Males Females prostate 31.5% bowel 11.2% lung 10.4% melanoma 5.1% head and neck 4.6% breast 31.8% lung 10.9% bowel 9.3% melanoma 5.6% corpus uteri 5.1% Males prostate 31.5% bowel 11.2% lung 10.4% melanoma 5.1% head and neck 4.6% Females breast 31.8% lung 10.9% bowel 9.3% melanoma 5.6% corpus uteri 5.1%

And while it used to be considered a disease of older adults, that’s changing. More people under 50 are being diagnosed due to a mix of factors like change in diet and lifestyle.2

What increases my risk?

Some personal factors can increase your chance of developing bowel cancer.

Some personal factors increase the chance of developing bowel cancer.  They raise risk but don’t guarantee you’ll get cancer; likewise many people with no known risk factors still do.

The following risk factors should be considered:

Age & family history:
Risk increases with age and is higher if a close relative has had bowel cancer or had polyps removed

Inherited conditions & bowel diseases: Certain genetic syndromes and chronic inflammatory bowel conditions can raise risk

Lifestyle factors: Type 2 diabetes, a low‑fibre/high‑fat diet, lack of exercise, obesity, smoking and heavy alcohol use can all contribute3



Potential Symptoms

Symptoms can be subtle - don’t ignore your gut.

There are a range of symptoms that can be associated with bowel cancer but it is also worth remembering that some people may experience no symptoms in the early stages, highlighting the importance of regular screening.

If symptoms are present, they may include:

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Change in bowel habits
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Blood in or on your stool
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Diarrhoea or constipation
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Abdominal pain, aches, or cramps
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Unexplained weight loss

It is important to note that these symptoms may not be related to cancer so speaking with your GP and using a screening test can help provide peace of mind.

How Is Bowel Cancer Detected?

Your screening options, explained simply

The turning point for many is a simple screening test. If you're at average risk, international guidelines recommend starting screening by age 45.

Your Screening Options

1
FIT tests:

At‑home stool tests that look for hidden blood. They're non‑invasive but can miss growths that aren't bleeding or may detect blood from other causes.

2
DNA tests (e.g., Colosafe®):

These at‑home kits analyse stool for genetic markers from polyps or cancer. They can find cancers that FIT tests sometimes miss, including early‑stage disease.

3
Colonoscopy:

Examines your bowel directly using a small camera. Though it requires a hospital visit and bowel preparation, it's both diagnostic and preventative - polyps can be removed during the procedure before they become cancer.

Prevention: Taking Control Before Cancer Starts

Bowel cancer is one of the few cancers you can prevent with early action. Imagine being able to stop it before it starts. That’s the power of screening and lifestyle changes.

What you can do today:

  • Get screened regularly starting at age 45 (or earlier if you have risk factors)
  • Eat well: more fruits, vegetables, and fiber
  • Move more: regular physical activity lowers your risk
  • Avoid tobacco and limit alcohol
  • Maintain a healthy weight

Bowel cancer is common but beatable when caught early.  Healthy habits and regular screening significantly reduce your risk.

Colosafe is one tool that can help.  If you have symptoms associated with bowel cancer or a family history of the disease, talk to your doctor and consider ordering a test today.

References

[1]National Cancer Registry Ireland. Cancer in Ireland 1994–2022: Annual statistical report (2024). ReportPDF. • [2]American Cancer Society. Colorectal Cancer Facts & Figures 2023–2025. PDF. • [3]American Cancer Society. Colorectal Cancer Risk Factors. Web. • [4]NCI. Screening Tests to Detect Colorectal Cancer and Polyps. Web.