Colon Cancer Facts & Prevention

Colon cancer — part of a group of cancers called colorectal cancer — is common, serious, and highly preventable when detected early. At GILC, we aim to provide clear, evidence-based information to help you protect your digestive health.

What Is Colon Cancer?

Colon cancer starts when abnormal cells grow in the colon (large intestine). Over time, these cells can form polyps — small growths on the inner lining — that may develop into cancer if not identified and removed early.

Colon cancer is often grouped with rectal cancer under the term colorectal cancer. Many early cases show no symptoms, which is why screening is vital for prevention. 

How Common Is Colon Cancer? (2025 Statistics)

Colon and rectal cancer remain among the most frequently diagnosed cancers in the United States:

• Approximately 154,270 Americans are expected to be diagnosed with colorectal cancer in 2025.

• Of those diagnoses, an estimated 107,320 will be new cases of colon cancer alone.

• Roughly 52,900 people are projected to die from colon and rectal cancers in 2025. The lifetime risk of developing colorectal cancer is about 1 in 24 for men and 1 in 26 for women.

Colorectal cancer is one of the top 4 cancers in the U.S. in terms of new cases each year, behind breast, prostate, and lung cancers. 

Who Is at Risk?

Non-Modifiable Risk Factors

• Age: Most cases occur in adults age 45 and older.
• Family history of colon cancer or polyps.
• Certain genetic syndromes (like Lynch syndrome).

Modifiable Risk Factors

• Diet high in processed/red meats and low in fiber.
• Physical inactivity and obesity.
• Smoking and heavy alcohol use.

Rates of colorectal cancer are also increasing in younger adults under age 50, making early discussion of risk and screening especially important.

Colon Cancer Symptoms to Watch For

In early stages, colon cancer may not cause symptoms. But when signs appear, they can include:

• Blood in the stool or rectal bleeding
• Changes in bowel habits lasting more than a few days
• Persistent abdominal pain or cramping
• Unexplained weight loss
• New onset anemia (low red blood cell count)

Even if symptoms seem mild or temporary, it’s important to discuss them with your GI provider. 

Why Screening Matters

Start Early — At Age 45

Current guidelines recommend that most people begin screening at age 45. For those with higher risk due to family history, personal medical history, or genetic conditions, earlier screening may be recommended.

Common Screening Options

• Colonoscopy — gold standard allowing polyp removal during the procedure.
• Stool-based tests (like FIT or DNA-based tests) — non-invasive alternatives.
  
  

Screening can prevent cancer by detecting polyps early or finding cancer when it’s most treatable. Despite its importance, a significant portion of adults aren’t up to date with recommended screenings. 

Prevention: Steps You Can Take

1. Maintain a Healthy Lifestyle

• Eat fiber-rich foods (vegetables, fruits, whole grains).
• Exercise regularly and maintain a healthy weight.
• Avoid tobacco and limit alcohol intake.
  
  

2. Know Your Family History

If colon cancer runs in your family, speak with your provider about earlier and more frequent screening.

3. Stay Current with Screenings

Routine screenings remain the most effective prevention strategy. Early detection dramatically increases treatment success and lowers mortality.

Final Thoughts: Your GI Health Matters

Colon cancer is common — but that doesn’t mean it’s inevitable. With proactive screening, lifestyle changes, and early intervention, most cases can be prevented or successfully treated. Our team is here to guide your care and answer your questions about risk, screening options, and colon cancer prevention.

👉 Schedule a consultation at Gastrointestinal and Liver Consultants today and take control of your colon health.