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Colon Cancer Screening: When to Start & What to Expect

A medical illustration showing the appearance of colorectal cancer and the importance of screening early.

Colon cancer screening is not something most people look forward to. It is easy to put off. Easy to say, “I feel fine.” Easy to assume it is something to worry about later.

But here’s the truth. Colorectal cancer is unique in that routine screening can both detect early disease and prevent cancer altogether by identifying and removing precancerous polyps during procedures such as colonoscopy.

At UAB Medical West, our Gastroenterology team has one goal when it comes to screening: catch problems early, remove risk when possible, and give patients peace of mind.

If you’ve been wondering whether it is time for your screening, here is what you should know.

At a Glance

  • Colon cancer screening is recommended starting at age 45 for most adults at average risk.
  • Screening can prevent cancer by removing precancerous polyps before they develop.
  • Rates of colorectal cancer are rising in adults under 50, making early screening more important than ever.
  • Colonoscopy is the most comprehensive screening option and allows for detection and removal in one procedure.

Why Colon Cancer Screening Is More Important Than Ever

Colorectal cancer used to be considered a disease that primarily affected older adults. That is changing.

According to the American Cancer Society, colorectal cancer rates have been rising in adults under 50 over the past decade. While researchers are still studying why, the increase has been significant enough to change national screening recommendations.

That shift alone tells you something important. Early detection matters.

When colorectal cancer is found early, before it spreads, survival rates are significantly higher. Even more important, screening can detect and remove polyps before they ever become cancerous.

When Should You Get a Colon Cancer Screening?

A patient at UAB Medical West talking to a doctor about a colon cancer screening.

This is one of the most common questions patients ask.

For adults at average risk, current colon cancer screening guidelines recommend beginning at age 45. That is earlier than the previous starting point of 50, reflecting the rise in cases among younger adults.

If you have certain risk factors, such as:

  • A family history of colorectal cancer
  • A personal history of polyps
  • Inflammatory bowel disease
  • Genetic conditions linked to colon cancer

Your provider may recommend starting earlier.

At UAB Medical West, screening decisions are individualized. Our Gastroenterology department works closely with primary care providers to assess personal and family history before recommending a plan.

At What Age Do You Need a Colonoscopy?

While several screening options exist, colonoscopy remains the most comprehensive test.

For average-risk adults, the first colonoscopy is typically recommended at age 45. If the results are normal, the next one may not be needed for 10 years.

However, that timeline can change depending on findings, family history, or new symptoms.

A colonoscopy allows physicians to examine the entire colon and remove polyps during the same procedure. That ability to both detect and prevent cancer in one step is a major reason it is considered the gold standard.

Is a Colonoscopy Necessary If You Have No Symptoms?

This question comes up often, especially from people who feel healthy.

The answer is yes, in most cases.

Colorectal cancer often develops silently. Early-stage disease may cause no noticeable warning signs. Waiting for symptoms can mean waiting until the disease has progressed.

Screening is designed specifically for people without symptoms. It is a preventive measure, not just a diagnostic test.

That said, decisions are always personal. A conversation with your provider can help determine which screening option makes sense for you.

What Happens During a Colonoscopy?

If the idea of a colonoscopy makes you nervous, you are not alone. Much of the anxiety comes from not knowing what to expect.

The day before the procedure, you will follow a preparation plan to clean out your colon. This typically involves a clear-liquid diet and a prescribed prep solution. While not glamorous, it is temporary and essential for clear visibility.

During the procedure itself, you are given sedation to keep you comfortable. A gastroenterologist inserts a thin, flexible tube with a camera into the colon to examine the lining carefully. If polyps are found, they are usually removed right away.

The procedure generally takes about 30 minutes. Most patients go home the same day and resume normal activity within a day.

Other Colon Cancer Screening Options

Colonoscopy is not the only option.

Other screening methods include stool-based tests that look for hidden blood or abnormal DNA markers. These are typically done at home and repeated more frequently than a colonoscopy.

If a stool test result is positive, a colonoscopy is still needed to investigate further.

The right screening test depends on your risk factors, preferences, and overall health. The most important step is choosing a screening method and following through.

Symptoms You Should Never Ignore

A patient at UAB Medical West speaking with a doctor about potential colon cancer symptoms.

Even if you are younger than 45, certain symptoms should prompt a conversation with a provider:

  • Blood in the stool
  • Persistent changes in bowel habits
  • Unexplained weight loss
  • Ongoing abdominal discomfort
  • Iron-deficiency anemia

While these symptoms do not automatically mean cancer, they do warrant evaluation.

Early Detection Changes Outcomes

Here is what makes screening powerful: when colorectal cancer is detected early, treatment is often more straightforward and more successful. When polyps are removed before becoming cancerous, the disease is prevented entirely.

That is why routine screening is not just another box to check. It is a proactive step that protects your long-term health.

And with colorectal cancer cases rising among younger adults, staying current with screening recommendations has never been more important.

Taking the Next Step Against Colon Cancer

If you are approaching age 45, have risk factors, or simply are unsure where you stand, now is a good time to start the conversation.

UAB Medical West’s Gastroenterology department works closely with patients across the Birmingham Area and West Jefferson County to develop evidence-based, personalized, and prevention-focused screening plans.

Screening may not be exciting. But it is one of the most impactful health decisions you can make.

And sometimes, the most powerful medical care is the care that prevents something from ever happening at all.


Schedule Your Colon Cancer Screening Today at UAB Medical West

If you’re 45 or older, or have risk factors for colorectal cancer, don’t wait to get screened. Schedule your appointment today and take a proactive step toward protecting your health.

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